https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/lung-introduction/v/meet-the-lungs 2024-04-04T15:34:20.714536152Z Meet the lungs! Breathing in through the mouth or nose, air travels down the throat, through the Adam's apple or voice box, and into the lungs. The lungs, which look like an upside-down tree, direct air to tiny sacs called alveoli. Oxygen from the air enters the bloodstream, while waste carbon dioxide exits into the alveoli and is exhaled. This process is vital for human survival. Rishi Desai video https://cdn.kastatic.org/googleusercontent/uH7kTzlYMjpw2kX36_nrlBZ_1Q4BmB8OwW_tVhTLOdAD8DsUUgNrol2mUSTQgJpc4c3xwRT1iOcP2YQpTDjw5zqn Meet the lungs! Breathing in through the mouth or nose, air travels down the throat, through the Adam's apple or voice box, and into the lungs. The lungs, which look like an upside-down tree, direct air to tiny sacs called alveoli. Oxygen from the air enters the bloodstream, while waste carbon dioxide exits into the alveoli and is exhaled. This process is vital for human survival. https://cdn.kastatic.org/ka-youtube-converted/qGiPZf7njqY.mp4/qGiPZf7njqY.mp4 576 Breathing https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:human-body-systems/a/hs-the-respiratory-system-review 2026-04-26T16:30:39.382257956Z Learn: The respiratory system review Learn about the organs and functions of the respiratory system. article https://www.khanacademy.org/science/biology/human-biology/circulatory-pulmonary/v/the-lungs-and-pulmonary-system 2023-09-14T11:22:40.102153098Z The lungs and pulmonary system Breathing is a vital process that allows our bodies to take in necessary oxygen and expel waste carbon dioxide. Air enters through the nose or mouth, journeys down the throat, and reaches the lungs via tubes called bronchi. These bronchi split into smaller tubes, bronchioles, ending in tiny air sacs known as alveoli. Oxygen crosses the alveoli membrane into our bloodstream, while carbon dioxide moves from the blood into the alveoli, ready to be exhaled. Sal Khan video https://cdn.kastatic.org/googleusercontent/NyToBnsug5GUIIcabg128TKMXw0XjH7O60403MS7bHx47wu9rho8CCYwLMQUb5zF84dmLHm-c2SnfMDd_G2jtlc The lungs and pulmonary system Breathing is a vital process that allows our bodies to take in necessary oxygen and expel waste carbon dioxide. Air enters through the nose or mouth, journeys down the throat, and reaches the lungs via tubes called bronchi. These bronchi split into smaller tubes, bronchioles, ending in tiny air sacs known as alveoli. Oxygen crosses the alveoli membrane into our bloodstream, while carbon dioxide moves from the blood into the alveoli, ready to be exhaled. https://cdn.kastatic.org/ka-youtube-converted/SPGRkexI_cs.mp4/SPGRkexI_cs.mp4 1233 Breathing https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-2/x01ceb15d0be61009:untitled-589/e/mechanism-of-breathing 2025-01-29T06:48:52.84441926Z Mechanism of breathing Inspiration, expiration, intrapulmonary pressure gradients, intercostal muscles, diaphragm. mahathi exercise https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/lung-introduction/v/how-does-lung-volume-change 2020-09-09T23:28:11Z How does lung volume change? Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy. Rishi Desai video https://cdn.kastatic.org/googleusercontent/Svp5O2K5VNRFki7UNLdrrwSaDaiog3zx0oHOj1Tfrgc_zszCADB68drM-ibzePQDHmUAlYJwWCXbAu0dpqAK4xoE How does lung volume change? Learn about how muscle contraction and lung recoil actually help the lungs change their volume with every breath! Rishi is a pediatric infectious disease physician and works at Khan Academy. https://cdn.kastatic.org/ka-youtube-converted/dTsUyXXudvA.mp4/dTsUyXXudvA.mp4 490 Breathing https://www.khanacademy.org/science/grade-7-science-snc-aligned/x64f379bc07a3640a:human-respiratory-and-circulatory-system/x64f379bc07a3640a:breathing/v/breathing-ur 2025-08-08T00:24:37.843818748Z Breathing Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Breathing Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/eaGqQ-wwV5k.mp4/eaGqQ-wwV5k.mp4 235 Breathing https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:human-gas-exchange/x2a084a90105205d2:breathing-mechanism-and-gas-exchange-in-action/e/mechanism-of-breathing-and-gas-exchange 2026-03-05T08:50:45.400692349Z Mechanism of Breathing and Gas Exchange How breathing and gas exchange occur in the lungs. Nivedhitha Suresh exercise https://www.khanacademy.org/science/in-in-class-10-biology/in-in-life-processes/in-in-respiration-in-human-beings/e/breathing-in-animals 2026-03-31T17:15:33.948437145Z Breathing in animals Practice on how animals breathe Saiyem exercise