Physics
Why do birds not have respiratory trouble at the time of flying at high altitude ?
Their lungs are very large
They fly inactively
They have extra air sacs
They use less oxygen
They have extra air sacs
Because flying takes a tremendous amount of energy, birds need to get lots of oxygen. The extra air sacs in their lungs help them to keep fresh air flowing in, unlike mammals, where the โoldโ air within the trachea and mouth (which has low oxygen content and high CO levels) in inhaled each time. Birds eliminate this โanatomical dead spaceโ problem by using air sacs.
They have extra air sacs Because flying takes a tremendous amount of energy, birds need to get lots of oxygen. The extra air sacs in their lungs help them to keep fresh air flowing in, unlike mammals, where the โoldโ air within the trachea and mouth (which has low oxygen content and high CO levels) in inhaled each time. Birds eliminate this โanatomical dead spaceโ problem by using air sacs.
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