Find my revision workbooks here: https://www.freesciencelessons.co.uk/workbooks/shop/ In this video, we look at how gases are exchanged in the lungs. We start by looking at the overall structure of the lungs and then explore how the alveoli are adapted for maximum diffusion of gases in and out of the bloodstream. Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/?keywords=deliberate+thought Artist: http://incompetech.com/ Image credits: All images were created by and are the property of Autonomy Education Ltd.
Views: 133105 Freesciencelessons
Revision notes and practice question for gas exchange: https://www.tes.com/teaching-resource/gas-exchange-11804216 Follow me on Instagram: https://www.instagram.com/sciencesauce_online/ Twitter: https://twitter.com/science_sauce Facebook: https://facebook.com/sciencesauceonline/ The alveoli ("many alveoli", "one alveolus") are the sites of gas exchange in the lungs. They are tiny air sacks sometimes described as being cauliflower-shaped. Oxygen diffuses across the lining of the alveoli and blood capillaries into and into red blood cells. Carbon dioxide diffuses from the blood to the alveoli. A concentration gradient is maintained by breathing as well as blood flow. The main adaptation of the gas exchange surface are: 1. Large surface area 2. Thin wall 3. Moist lining 4. Good blood supply 5. Good ventilation
Views: 240701 Science Sauce
So we all know that breathing is pretty important, right? Today we're going to talk about how it works, starting with the nameless evolutionary ancestor that we inherited this from, and continuing to the mechanics of both simple diffusion and bulk flow, as well as the physiology of breathing, and finishing with the anatomy of both the conducting zone and the respiratory zone of your respiratory system. Table of Contents The Mechanics of Both Simple Diffusion and Bulk Flow 2:44 The Physiology of Breathing 4:07 Anatomy of the Conducting Zone 5:47 Anatomy of Respiratory Zone 7:07 *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark, Jan Schmid, Simun Niclasen, Robert Kunz, Daniel Baulig, Jason A Saslow, Eric Kitchen, Christian, Beatrice Jin, Anna-Ester Volozh, Eric Knight, Elliot Beter, Jeffrey Thompson, Ian Dundore, Stephen Lawless, Today I Found Out, James Craver, Jessica Wode, Sandra Aft, Jacob Ash, SR Foxley, Christy Huddleston, Steve Marshall, Chris Peters -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 2462177 CrashCourse
Why do our bodies need to exchange oxygen and carbon dioxide with the air, and how do they do it? This video is part of our Body Systems unit. You can find out more about Stile at https://stileeducation.com/ or check out the unit here: https://stileapp.com/au/library/publishers/cosmos-magazine/compilations/cosmos-lessons/5791d5d0-d006-4efb-8974-9294b6b56048
Views: 46599 Stile Education
Paul Andersen starts this video with a description of the respiratory surface. He explains how worms, insects, fish and mammals take in oxygen and release carbon dioxide. He then tours the major organs of the respiratory system; from the pharynx to the trachea, bronchus, bronchiole and alveoli. He also explains how oxygen is carried on the hemoglobin and how carbon dioxide is carried as bicarbonate. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Views: 668440 Bozeman Science
You can support the work of campbellteaching, at no cost whatsoever to yourself, if you use the link below as your bookmark to access Amazon. Thank you. If in the US use this link http://goo.gl/mDMfj5 If in the UK use this link http://goo.gl/j0htQ5
Views: 47046 Dr. John Campbell
IGCSE Biology video podcast: http://sciencesauceonline.com/biologypodcast Subscribe to the podcast on iTunes: https://itunes.apple.com/gb/podcast/biology-by-science-sauce/id1204827854?mt=2 Twitter: https://twitter.com/science_sauce The trachea brings air to and from the lungs. Air moves past the larynx, down the trachea, then splits into two bronchi, which then divide into many bronchioles within the lungs. At the ends of the bronchioles are alveoli (the sites of gas exchange). Protecting the lungs are the ribs, which can move up and down with the help of the internal and external intercostal muscles. The diaphragm, a sheet of muscle beneath the lungs, also aids in breathing. Cartilage surrounds the trachea and bronchi to provide structural support, prevent the airways from being squashed and blocked off.
Views: 2679 Science Sauce
Respiration is carried out by all living things. Animals need oxygen to carry out aerobic respiration and they need to get rid of the waste product called carbon dioxide. This is called gas exchange. Swapping one gas for another. Animals have evolved different mechanisms for carrying out gaseous exchange. The most important thing is to create a large surface area, the bigger the surface area the faster diffusion of the gases can occur. Secondly they all have a good blood supply. You want to get oxygen into the blood and carbon dioxide out as quickly as possible so the blood travels very close to the exchange surface to once again maximise diffusion. SUBSCRIBE to the Fuse School YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. JOIN our platform at www.fuseschool.org This video is part of 'Chemistry for All' - a Chemistry Education project by our Charity Fuse Foundation - the organisation behind FuseSchool. These videos can be used in a flipped classroom model or as a revision aid. Find our other Chemistry videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the Fuse School platform and app: www.fuseschool.org Follow us: http://www.youtube.com/fuseschool Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: [email protected]
Views: 43406 FuseSchool - Global Education
Gas Exchange Physiology Animation ✔✔✔FOR MORE MEDICAL VIDEOS VISIT: http://freemedicalvideos.com/ Website: http://www.medical-institution.com/ Facebook: http://www.facebook.com/Medicalinstit... Twitter: https://twitter.com/USMLE_HighYield This information is intended for educational purposes only, and should not be interpreted as medical advice. Please consult your physician for advice about changes that may affect your health. This Animation video teaches you the basic concept of Gas Exchange Physiology in the respiratory system. What is gas exchange How does gas exchange work Why is gas exchange important Oxygen exchange Respiratory system
Views: 603381 Medical Institution
Urry/Cain/Wasserman/Minorsky/Reece - Campbell Biology, 11/e MasteringBiology Figure Walkthroughs guide students through key figures with narrated explanations, figure markups, and questions that reinforce important points.
Views: 126236 Pearson Higher Education
In this video I discuss the basics of the Respiratory System, including how the respiratory system works, I go through the breathing process, and show how breathing works. Transcript We are going to look at the functions of the respiratory system, its components, how the system works, and some things you can do to maintain a healthy respiratory system. The respiratory system’s main functions include, transporting air into and out of the lungs, protecting the body against harmful particles that are inhaled, and it’s most important function, the exchange of oxygen and carbon dioxide. So, its basically about breathing. Now lets take a look at a diagram and we will go through The respiratory systems main components. Starting here with the nose and nasal cavity, the mouth or oral cavity, the pharynx is here and it what we consider the throat. The pharynx is considered part of the digestive system as well as the respiratory system, and it connects the respiratory openings to the larynx and esophagus. The esophagus is not part of the respiratory system, and I will get to why I put it in the diagram in a minute. Next we have the larynx, also called the voice box because the vocal cords are located here. The trachea also called the windpipe, is here, and it connects to the bronchi, which merge into smaller tubes called bronchioles. And, the bronchioles connect to tiny air sacs called alveoli. And then down here is the diaphragm. Now lets go through a very basic look at what happens during the breathing process. So, air is breathed in through the nose or mouth. When it enters through the nose, it gets spread out by these shelf-like things here called conchae. The conchae help humidify the air, and trap some inhaled particles. They also warm the air. The air next passes through the pharynx and enters the trachea. One note here. This little flap like structure is called the epiglottis and it has an important function. During breathing it is pointed upward allowing airflow into the trachea, however, during swallowing it folds down to prevent food from going into the trachea, directing the food into the esophagus. If food does enter the trachea, the gag reflex is induced to protect the respiratory system. The epiglottis here, this little thing shows you how amazing the human body is. Anyways, back to air flow. So, air continues down the trachea and enters the bronchi. From there it enters into smaller bronchioles, and finally into the alveoli, which are surrounded by a network of capillaries. And this folks is where the magic happens. Oxygen enters the alveolar sac and the gas exchange occurs. Capillaries give up their waste carbon dioxide, and pick up the oxygen. Carbon dioxide is then exhaled through the air passage the oxygen was inhaled through, and the oxygen picked up by the blood returns to the heart. During this breathing process the diaphragm is busy as well, contracting as we breath in, which allow the lungs to expand, and relaxing as we exhale. Some minor respiratory disorders include, the common cold, influenza, acute bronchitis, which is inflammation of the bronchi, and pneumonia, which is inflammation of the bronchioles and alveoli. Some of the more damaging disorders include, chronic bronchitis, where the bronchi become inflamed and narrowed, mainly caused by tobacco smoke, emphysema, where the alveoli become overstretched, and lung cancer, which in almost 9 of 10 cases is caused by tobacco smoke. What can you do to maintain or improve respiratory system health? Maintian a healthy weight, excess weight compresses respiratory muscles and puts more stress on your lungs. Drink plenty of water, dehydration can cause the mucus lining your airways to thicken and become sticky, making you more susceptible to illness. Consume foods rich in vitamins, minerals and antioxidants, such as fruits, veggies and nuts, which can help to reduce inflammation and fight oxidative damage. Limit exposure to common allergens such as dust mites, pollen and animal dander. Maintain good hygiene, many respiratory viruses are transmitted because of bad hygiene and poor hand washing. Don’t over consume alcohol, it dehydrates the body and weakens the immune system. Get more active, regular aerobic activity can help our respiratory system. Add indoor plants, plants have been shown to help improve air quality. Bottom line. As you can see the respiratory system has a major impact on overall health, as you may already know, breathing is kind of important. So, eat a healthy diet, maintain an active lifestyle, and keep up good hygiene.
Views: 385547 Whats Up Dude
This video covers the following syllabus objectives from Edexcel IGCSE Biology 9-1 2.48 Explain how alveoli are adapted for gas exchange by diffusion between air in the lungs and blood in capillaries. 2.50 Practical: investigate breathing in humans, including the release of carbon dioxide and the effect of exercise. For a PowerPoint on this topic visit www.mrexham.com
Views: 960 MrExham
For A Level Biology, Module 3 for OCR exam board.
Views: 1617 Revisify
Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video. Created by Rishi Desai. Watch the next lesson: https://www.khanacademy.org/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/v/the-respiratory-center?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn Missed the previous lesson? https://www.khanacademy.org/test-prep/nclex-rn/rn-respiratory-system/rn-the-respiratory-system/v/fick-s-law-of-diffusion?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/). About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s NCLEX-RN channel: https://www.youtube.com/channel/UCDx5cTeADCvKWgF9x_Qjz3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 370961 khanacademymedicine
Your respiratory system is a system in humans that is designed to extract oxygen from the air so we can use it in respiration around the body and at the same time get rid of carbon dioxide gas into the air which is the waste product from respiration. oxygen gas travels through the respiratory system, as you inhale, the molecule is drawn in through the mouth or the nose, it goes into the back of the throat where it enters a tube called the trachea. The tractor or windpipe has special rings of cartilage to keep it open at all times so you can breathe if you are lying down asleep or on a trampoline. The oxygen molecule now travels down the trachea and they will go into either the left or the right lung via a tube called the bronchus. This bronchus then splits into smaller tubes called bronchioles and finally the oxygen molecule will make its way into a tiny air sac called an alveolar, these alveoli are surrounded by tiny blood vessels called capillaries and the oxygen molecule now passes across from the air into the blood via a process of diffusion. At the same time the carbon dioxide molecule goes the other way coming out of the blood and into the alveoli as you exhale. As you exhale the carbon dioxide will take the journey back up the bronchioles a bronchus the trachea and out of the mouth. This happens to millions of molecules with each breath have about 300 million alveoli in each lung. On average, you breathe like this 12 to 16 times a minute. Unlike your digestive system the respiratory system is a dead end. If something bad gets into your lungs it's very hard to get it back out. As usual the body has an answer to look very closely at the cells lining the tracker and the bronchi some of them have tiny little hairs on called cilia and in between these cells are other cells called goblet cells that are secreting mucus. This mucus traps dirt dust and bacteria before entered the lungs. The cilia then what this mucus up into the mouth where it can be swallowed to be killed by your stomach acid. There are many things that can go wrong with your lungs such as asthma, pneumonia and diseases associated with smoking such as emphysema and chronic bronchitis. However, if you have a problem a doctor may perform a bronchoscopy. This is when they put a tube with a light and the camera on it into your Airways and look for signs of inflammation or bleeding. SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Find all of our Chemistry videos here: https://www.youtube.com/watch?v=cRnpKjHpFyg&list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV Find all of our Biology videos here: https://www.youtube.com/watch?v=tjkHzEVcyrE&list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0 Find all of our Maths videos here: https://www.youtube.com/watch?v=hJq_cdz_L00&list=PLW0gavSzhMlTyWKCgW1616v3fIywogoZQ Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us: http://www.youtube.com/fuseschool Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: [email protected]
Views: 21712 FuseSchool - Global Education
Check out the following links below! Over 1000+ Medical Questions: http://www.5minuteschool.com DONATE + SUPPORT US: http://paypal.me/5minuteschool Patreon: https://goo.gl/w841fz Follow us on Twitter: http://twitter.com/5MinuteSchool Follow us on Instagram: http://instagram.com/5minuteschool My personal Instagram: http://instagram.com/shaz.s11 Contact us: [email protected]
Views: 65652 5MinuteSchool
In this video, we look at the tracheal system in insects. This is a nice quick and short topic, but can be tricky! - The overall structure of the system - Ventilation - Limitations - Preventing water loss This video was made for AQA AS Level Biology students studying Unit 2.
Views: 95449 Mr Pollock
A mini lessons for AS Biology Students. This relates to the AQA Specification, Unit 2: Variety of Living Organisms. Covered in this lesson: -Structure of the leaf -Structure and function of the stomata -Exchange in the leaf As ever, we're using the Toole & Toole AQA AS Biology textbook Enjoy!
Views: 80615 Mr Pollock
Learn how oxygen enters the body and how carbon dioxide exits by watching this video. Tuition classes http://www.vbest.edu.my/ Blogspot http://mrsaimun.blogspot.com/search/label/IGCSE Order Special Notes from http://buukbook.com/ Online 1 to 1 tuition lessons at http://www.mega.edu.my/ Education Tips & News http://mrsaimun.com/ Other videos: Biology — Factors Affecting Enzyme Activity: https://www.youtube.com/watch?v=48x8ddi_Ur4&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs Biology — Transport of Water in Plant: https://www.youtube.com/watch?v=dBtY61Ztm0I&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=2 Biology — Human Heart: https://www.youtube.com/watch?v=Qbqh4n47t6E&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=3 Biology — Transport System Plant: Xylem and Phloem: https://www.youtube.com/watch?v=n3xPYNA14aM&index=4&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs Biology — Inheritance of Blood Group and Rhesus Factor: https://www.youtube.com/watch?v=x-I6OXoOlpQ&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=5 Biology — Movement of Substances Across Plasma Membrane: https://www.youtube.com/watch?v=_sPuvAuKNtk&index=6&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs Biology — Lymphatic System: https://www.youtube.com/watch?v=9QBlgVTGkG4&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=7 Biology — Meiosis: https://www.youtube.com/watch?v=9U9sA4aT5ms&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=8 Biology — Plasma Membrane Structure: Phospholipid: https://www.youtube.com/watch?v=PaYLnZkOB_Y&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=9 Biology — Blood Vessels: https://www.youtube.com/watch?v=UHDBECleZvY&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=10 Biology — Urine Synthesis in Kidney: https://www.youtube.com/watch?v=XmAhuCzoDFM&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=11 Biology — Factors affecting Transpiration Rate: https://www.youtube.com/watch?v=J2DMGUHF5jY&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=12 Biology — Human Digestive System Part 1: https://www.youtube.com/watch?v=mFq1WctSnGw&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=13 Biology — Gaseous Exchange and Breathing Mechanism: https://www.youtube.com/watch?v=Wv1HWCzXzrY&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=14 Biology — Human Digestive System Part 2: https://www.youtube.com/watch?v=WpAITHlIaUY&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=15 Biology — Photosynthesis: https://www.youtube.com/watch?v=DEaSz-GnFlk&index=16&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs Biology — The Role of Immune System: https://www.youtube.com/watch?v=B2EQoHLYJIk&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs&index=17 Biology — Structure of Flower, Pollination and Fertilisation: https://www.youtube.com/watch?v=dYycFXECX14&index=18&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs Biology — Law of Inheritance: https://www.youtube.com/watch?v=9lqbyS-q66A&index=19&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs Biology — Neurone: https://www.youtube.com/watch?v=Wuqto7NaAOM&index=20&list=PLKrwB09sDEjofOVF3iXWR33nIDvorajvs
Views: 1289 mr sai mun
PATREON EXCLUSIVE PAST PAPER TUTORIALS https://www.patreon.com/cambridgein5minutes Hey guys ! Today we're looking at gas exchange in humans. Most of the topic is straight forward except for the section about how we breath in and out. For some it may be quite easy, but for some others it may be rather confusing. I've tried my best to explain to you how it works but if you still have further questions please comment below. Best of luck guys ! LINK FOR LIME WATER DEMONSTRATION: https://www.youtube.com/watch?v=QR6GsydYUSI 📘 FREE Comprehensive notes on https://www.freeexamacademy.com ✏️Join patreon to access EXCLUSIVE content! https://www.patreon.com/cambridgein5minutes ✔️ Past paper tutorials ✔️ Annotated exams ✔️ Power point slides ✔️ And more!
Views: 17633 Cambridge in 5 minutes
In this video, we will look at gas exchange in lungs and how the body has adapted to complete this function in the most effective way possible. http://imstuck.wix.com/imstuckgcserevision
Views: 6164 I'm Stuck - GCSE and A-Level Revision
Useful for CBSE, ICSE, NCERT & International Students Grade : 10 Subject :Biology Lesson : Life process respiration Topic: Gas Exchange in Plants Gas Exchange in Plants. In order to carry on photosynthesis, green plants need a supply of carbon dioxide and a means of disposing of oxygen. In order to carry on cellular respiration, plant cells need oxygen and a means of disposing of carbon. Visit www.oztern.com to find personalized test preparation solutions for Pre Medical - AIPMT, AIIMS, JIPMER, State, Pre Engineering - IIT JEE, JEE MAIN, BITSAT, State and Foundations - Class 6 to 10.
Views: 33318 CBSE
Another video on Exchange! In this video we examine the gills as an example of an exchange surface. We also discuss how fish pass water over their gills and how countercurrent flow maintains favourable exchange of oxygen. Made for AQA AS Level students studying Unit 2: Variety of Living Organisms.
Views: 140057 Mr Pollock
Ava Hearts Biology presents: Fish Gill Dissection for GCSE and A Level. Ever wondered what a counter current gas exchange system looks like? All dissection samples curtesy of www.samplesforschools.com Coming Soon! Workshops and #watchavalive #avaheartsbiology events, please visit www.avaheartsbiology.co.uk Please note:The animal material used in this dissection has not been produced for the purpose of the video – it is a regular by-product of the meat industry, available for consumption from some butchers, or part of the waste stream if not used for dissection. This video is for educational and demonstration purposes only. If you undertake your own dissection please take due safety precautions: - Take care with sharp dissecting tools. - Observe careful hygiene precautions after the dissection.
Views: 21613 Ava Hearts Biology
Gas Exchange: The Structure of the Lungs in a Snap! Unlock the full A-level Biology course at http://bit.ly/2ZagyJm created by Adam Tildesley, Biology expert at SnapRevise and graduate of Cambridge University. The key points covered of this video include: 1. Introduction to the Lungs 2. Trachea and Bronchi 3. Bronchioles 4. Alveoli Introduction to the Lungs Mammals require a large amount of oxygen and produce a large amount of carbon dioxide. They are large organisms, they have a high metabolic rate and level of activity. To deal with these constraints mammals evolved lungs. The Trachea and Bronchi The trachea and bronchi connect the lungs to the mouth. They contain many C-shaped rings of cartilage to provide support and flexibility. This diagram shows a cross-section of a bronchus as would be seen under a microscope. Smooth muscle allows them to constrict to reduce air flow. The walls are line with ciliated epithelial tissue containing goblet cells. Goblet cells secrete mucus that traps dirt and pathogens. Ciliated epithelium wafts mucus up out of the airways. Bronchioles The bronchioles lead from the two bronchi to the alveoli. The bronchi consist mainly of smooth muscle and epithelial cells. Larger ones may have cartilage but most do not. The Alveoli The lungs consist mostly of millions of alveoli. Alveoli consist of squamous epithelial tissue and elastic fibres. This is a micrograph of a section of lung tissue showing alveoli. The alveoli show a variety of adaptations that suit them to gas exchange: Large surface area and good blood supply, short diffusion distance for gasses to travel. Summary Lungs are highly complex gas exchange organs The alveoli are gas-filled sacs specialised for gas exchange The trachea, bronchi and bronchioles deliver gasses to and from the alveoli The functions on different parts of the lungs are represented in their structures that show their specific adaptations towards carrying out their roles
Views: 179 SnapRevise
https://unacademy.com/lesson/introduction-of-breathing-and-exchange-of-gases-structure-of-lung-in-hindi/7KZOR0QY Structure of Lungs and their parts https://unacademy.com/lesson/structure-of-trachea-alveoli-their-clinical-significance-in-hindi/J5LLRAIA Structure of Alveoli and their parts https://unacademy.com/lesson/structure-of-trachea-alveoli-their-clinical-significance-in-hindi/J5LLRAIA MCQ from Respiratory system https://unacademy.com/lesson/mcq-from-structure-of-lungs-and-their-parts-surfactant-in-hindi/AG9XJNQO Mechanisms of Respiration https://unacademy.com/lesson/mechanisms-of-perspiration-inspiration-expiration-in-hindi/J4W02N1C
Views: 10380 Dr S K Singh
GCSE Biology Revision: Breathing In this video, we look at breathing. We explore how the diaphragm and intercostal muscles work together to ventilate the lungs. We then look at how ventilation increases the diffusion of gases in the alveoli.
Views: 59152 Freesciencelessons
Download the Show Notes: http://www.mindset.co.za/learn/sites/files/LXL2013/LXL_Gr11LifeSciences_20_Gaseous%20Exchange_17July.pdf In this Grade 11 Life Sciences live show we take a close look at Gasesous Exchange. In this lesson we discuss what is gasesous exchange. We consider the requirements of an efficient gaseous exchange surface. We look at diversity in gas exchange systems. We discuss structure and adaptations of the human gaseous exchange systems. We look at the mechanism of breathing. We discuss gaseous exchange at lung surface and at tissue level. We look at transport of gases in the blood. We take a look at Homeostasis. Finally, we look at relevant terminology. Visit the Learn Xtra Website: http://www.learnxtra.co.za View the Learn Xtra Live Schedule: http://www.learnxtra.co.za/live Join us on Facebook: http://www.facebook.com/learnxtra Follow us on Twitter: http://twitter.com/learnxtra ( E00198918 )
Views: 14678 Mindset Learn
The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/health-and-medicine/respiratory-system/gas-exchange-jv/v/alveolar-gas-equation-part-1?utm_source=YT&utm_medium=Desc&utm_campaign=healthandmedicine Missed the previous lesson? https://www.khanacademy.org/science/health-and-medicine/respiratory-system/respiratory-system-introduction/v/thermoregulation-in-the-lungs?utm_source=YT&utm_medium=Desc&utm_campaign=healthandmedicine Health & Medicine on Khan Academy: No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound “Lub Dub.” About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Health & Medicine channel: https://www.youtube.com/channel/UC1RAowgA3q8Gl7exSWJuDEw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 1208199 Khan Academy
Discussion of how the Lungs fulfil the three key features of a specialised exchange organ: high surface area, thin barriers to diffusion and maintenance of concentration gradient to effectively exchange oxygen and carbon dioxide between the blood and the atmosphere. Then, a quick review of lung structure, with focus on how the structure relates to function of the lungs.
Views: 3934 Dr Bhavsar
In this video, we look at how gases are exchanged in plants. First we look at the different parts of a plant's leaf and how they are involved in gas exchange. We then look at how plants lose water vapour and how stomata can close to reduce this.
Views: 38912 Freesciencelessons
To purchase this DVD please visit http://www.greatpacificmedia.com/ Segment from the program Respiration and Circulation, Gas Exchange, Molecular Transport. DVD Description Our Respiration Circulation DVD looks at the flow of air through the conducting portions of the respiratory system to the alveoli before examing: the role of hemoglobin in gas exchange and O2 and CO2 transport in the blood; the operation of the respiratory control center; and the mechanics of breathing. The program then investigates the composition of blood and how it flows through the heart, arteries, capillaries and veins before looking at the role of the lymphatic system in fighting infection, transporting fats, and returning interstitial fluid to the blood.
Views: 429184 greatpacificmedia
Partial pressures of gases and gas exchange process in the lungs. Factors that affect gas exchange. This video and other related images/videos (in HD) are available for instant download licensing here : https://www.alilamedicalmedia.com/-/galleries/images-videos-by-medical-specialties/pulmonology ©Alila Medical Media. All rights reserved. Voice by: Ashley Fleming Support us on Patreon and get FREE image downloads and video early access: patreon.com/AlilaMedicalMedia All images/videos by Alila Medical Media are for information purposes ONLY and are NOT intended to replace professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition. Gas exchange is the major purpose of the respiratory system. Inhaled air unloads oxygen and picks up carbon dioxide in the alveoli of the lungs, while the blood picks up oxygen and unloads carbon dioxide. The oxygenated blood then travels to body’s tissues, where the reverse process happens. In the lungs, the gases move across a very thin respiratory membrane which consists of alveolar squamous cells, endothelial cells of blood capillaries, and their fused basement membranes. The exchange of gases occurs due to simple diffusion, as they flow down their concentration gradient, or partial pressure gradient. Atmospheric air is a mixture of gases, each of which independently contributes to its total pressure. The pressure of each individual gas is known as partial pressure. The atmospheric pressure is the sum of all partial pressures of gases that make up its content. The direction of gas movement from one area to another is determined by the difference in its partial pressure. A gas always moves from higher to lower partial pressure. Atmospheric air is brought into the lungs through inhalation, but the lungs are not completely emptied and replaced with outside air with each cycle of breathing. In fact, only a relatively small portion of air in the alveoli is refreshed with each breath. This makes the air composition in the alveoli significantly different from that of inhaled air. The gas exchange in the lungs occurs between this alveolar air and the blood in capillaries. Because the volume of blood in pulmonary capillaries at any moment is much smaller than the total volume of air in the alveoli, the gas exchange process essentially brings partial pressures of oxygen and carbon dioxide in the blood to the same levels as those in alveolar air. It is therefore important that the composition of alveolar air is closely monitored and adjusted to maintain the same values. The body does just that: if carbon dioxide levels increase or oxygen levels drop, the airways automatically dilate to bring them back to normal, and vice versa. Since gas exchange occurs between the air and the liquid of the blood, the movement of individual gases also depends on their solubility in water. This explains why nitrogen, despite being plentiful in atmospheric and alveolar air, does not diffuse much into the blood. Factors that affect gas exchange include: - The magnitude of partial pressure gradient: the greater the pressure difference, the more rapid the gas movement. At high altitudes, where partial pressures of all atmospheric gases are lower, the gradient for oxygen is smaller and it needs more time to diffuse into the blood. – The thickness of the respiratory membrane: the thinner the membrane, the faster the gas diffuses. Diseases that cause pulmonary edema, such as pneumonia or left-sided heart failure, increase the thickness of respiratory membrane and hinder gas exchange. - The amount of gas exchanged is directly proportional to the contact surface between the blood and the alveolar air. Diseases that affect alveolar surface, such as emphysema, reduce gas exchange efficiency and produce low blood oxygen levels.
Views: 2300 Alila Medical Media
Air first enters the body through the mouth or nose, quickly moves to the pharynx (throat), passes through the larynx (voice box), enters the trachea, which branches into a left and right bronchus within the lungs and further divides into smaller and smaller branches called bronchioles. The smallest bronchioles end in tiny air sacs, called alveoli, which inflate during inhalation, and deflate during exhalation. Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli. The walls of the alveoli actually share a membrane with the capillaries in which oxygen and carbon dioxide move freely between the respiratory system and the bloodstream. Oxygen molecules attach to red blood cells, which travel back to the heart. At the same time, the carbon dioxide molecules in the alveoli are blown out of the body with the next exhalation. The primary function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli. The layers of cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other. This barrier between air and blood averages about 1 micron (1/10,000 of a centimeter, or 0.000039 inch) in thickness. Oxygen passes quickly through this air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled. Oxygenated blood travels from the lungs through the pulmonary veins and into the left side of the heart, which pumps the blood to the rest of the body (see Biology of the Heart : Function of the Heart). Oxygen-deficient, carbon dioxide-rich blood returns to the right side of the heart through two large veins, the superior vena cava and the inferior vena cava. Then the blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide. Gas Exchange Between Alveoli and Capillaries: To support the exchange of oxygen and carbon dioxide, about 5 to 8 liters (about 1.3 to 2.1 gallons) of air per minute are brought in and out of the lungs, and about three tenths of a liter of oxygen is transferred from the alveoli to the blood each minute, even when the person is at rest. At the same time, a similar volume of carbon dioxide moves from the blood to the alveoli and is exhaled. During exercise, it is possible to breathe in and out more than 100 liters (about 26 gallons) of air per minute and extract 3 liters (a little less than 1 gallon) of oxygen from this air per minute. The rate at which oxygen is used by the body is one measure of the rate of energy expended by the body. Breathing in and out is accomplished by respiratory muscles. Air is brought to the alveoli in small doses (called the tidal volume), by breathing in (inhalation) and out (exhalation) through the respiratory airways, a set of relatively narrow and moderately long tubes which start at the nose or mouth and end in the alveoli of the lungs in the chest. Air moves in and out through the same set of tubes, in which the flow is in one direction during inhalation, and in the opposite direction during exhalation. During each inhalation, at rest, approximately 500 ml of fresh air flows in through the nose. Its is warmed and moistened as it flows through the nose and pharynx. By the time it reaches the trachea the inhaled air's temperature is 37 °C and it is saturated with water vapor. On arrival in the alveoli it is diluted and thoroughly mixed with the approximately 2.5–3.0 liters of air that remained in the alveoli after the last exhalation. This relatively large volume of air that is semi-permanently present in the alveoli throughout the breathing cycle is known as the functional residual capacity (FRC). At the beginning of inhalation the airways are filled with unchanged alveolar air, left over from the last exhalation. This is the dead space volume, which is usually about 150 ml. It is the first air to re-enter the alveoli during inhalation. Only after the dead space air has returned to the alveoli does the remainder of the tidal volume (500 ml - 150 ml = 350 ml) enter the alveoli. The entry of such a small volume of fresh air with each inhalation, ensures that the composition of the FRC hardly changes during the breathing cycle.
Views: 32648 AniMed
What are lungs? What are the different parts of the respiratory system? nose and mouth trachea and larynx bronchi and bronchioles alveoli How is air cleaned? How are alveoli adapted to gaseous exchange? What is the structure of an alveolus?
Views: 13282 Ms Cooper's IGCSE Biology
A Level Biology (NEW) Gas Exchange in an Insects Tracheal System - A-Level Biology Revision Notes ★★★ SUBSCRIBE | LIKE | SHARE | COMMENT BELOW! (ツ) ★★★ #ALevelBiology #RevisionNotes #LearnBiologyNet
Views: 1234 Learnbiology Net
Where do we get oxygen and glucose from for respiration? What is the difference between inspired and expired air? How can you test that expired air has a higher concentration than inspired air? What are the characteristics of a gaseous exchange surface?
Views: 1516 Ms Cooper's IGCSE Biology
https://goo.gl/Y1xJdT to unlock the full series of AS, A2 & A-level Biology videos created by A* students for the new OCR, AQA and Edexcel specification. This video will focus on: Why Do We Need Exchange Surfaces
Views: 1332 SnapRevise
Gaseous Exchange System. AS Biology. OCR Exam Board - Module 3. The "You need to know..." section has come from the OCR specification.
Views: 5470 Revisify
You can support the work of campbellteaching, at no cost whatsoever to yourself, if you use the link below as your bookmark to access Amazon. Thank you. If in the US use this link http://goo.gl/mDMfj5 If in the UK use this link http://goo.gl/j0htQ5 A review of the structures and tissues of the respiratory system, with focus on the trachea, plural membranes and lung tissue.
Views: 135939 Dr. John Campbell