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 The respiratory system https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/lung-introduction/v/inhaling-and-exhaling 2023-08-17T23:33:36.770424498Z Inhaling and exhaling Find out exactly why air goes in and out of the lungs. Discover how changes in lung volume affect air pressure, leading to the movement of air molecules in and out of the lungs. This process, crucial for respiration, is explained using a simple jar analogy. Rishi is a pediatric infectious disease physician and works at Khan Academy. Rishi Desai video https://cdn.kastatic.org/googleusercontent/SQkfgiCLzTh4R0AaTjEc2gRwVwDpZBjzLDmWoFgNl9aRs3O6Zzk9Im888XuR9CAHjiXnSAlgQiKv7AtZJGWNK39hkQ Inhaling and exhaling Find out exactly why air goes in and out of the lungs. Discover how changes in lung volume affect air pressure, leading to the movement of air molecules in and out of the lungs. This process, crucial for respiration, is explained using a simple jar analogy. Rishi is a pediatric infectious disease physician and works at Khan Academy. https://cdn.kastatic.org/ka-youtube-converted/mykrnTh1tz8.mp4/mykrnTh1tz8.mp4 779 The respiratory system 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 The respiratory system 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 The respiratory system 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/als-k-to-12-science/x46c2fc9f8e023990:2nd-quarter/x46c2fc9f8e023990:the-respiratory-system-structure-and-function-in-breathing/e/human-respiratory-system 2026-03-05T08:50:45.400692349Z Human Respiratory System Structure and function of the human respiratory system. Nivedhitha Suresh 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 https://www.khanacademy.org/science/how-does-the-human-body-work/x0fe8768432761c62:breathing-and-exchange-of-gases/x0fe8768432761c62:the-respiratory-system/e/the-respiratory-system 2026-02-16T08:20:40.549554389Z The respiratory system Structure of the lungs, bronchial tree, details of exchange vs conducting parts, alveoli, thoracic chamber, and pleura. mahathi exercise