https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:human-body-systems/a/hs-the-respiratory-system-review 2024-05-06T19:22:43.24334365Z The respiratory system review Learn about the organs and functions of the respiratory system. article 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 mechanism and gas exchange in action https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:human-gas-exchange/x2a084a90105205d2:breathing-mechanism-and-gas-exchange-in-action/v/the-lungs-and-pulmonary-system-in 2025-05-29T08:15:21.460476965Z The lungs and pulmonary system Let's understand how breathing works and the pulmonary system! Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw The lungs and pulmonary system Let's understand how breathing works and the pulmonary system! https://cdn.kastatic.org/ka-youtube-converted/H1XHIMtcZFk.mp4/H1XHIMtcZFk.mp4 1232 Breathing mechanism and gas exchange in action 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/cambridge-o-level-biology-cie/x2a084a90105205d2:human-gas-exchange/x2a084a90105205d2:breathing-mechanism-and-gas-exchange-in-action/e/respiration-in-humans 2026-04-07T22:23:57.656416987Z Respiration in humans Let's solve some questions on respiration in humans Vibhor Pandey exercise https://www.khanacademy.org/science/health-and-medicine/respiratory-system/respiratory-system-introduction/e/lung-quiz 2026-04-07T23:17:37.123726494Z Introductory respiratory system quiz Questions Rishi Desai exercise