Respiratory system
3B: Find out why we need to breathe and how we manage to do it. Air moves in and out of our lungs throughout the day and while we're sleeping. Find out how we control this important process.
3B: Find out why we need to breathe and how we manage to do it. Air moves in and out of our lungs throughout the day and while we're sleeping. Find out how we control this important process.
3B: Find out why we need to breathe and how we manage to do it. Air moves in and out of our lungs throughout the day and while we're sleeping. Find out how we control this important process.
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Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan to provide 'a free, world-class education for anyone, anywhere.'