why can humans hold their breath longer underwater than above water?
In: Biology
The Mammalian Dive Reflex diverts oxygen flow away from certain non-essential organs, giving priority to the brain and heart. Your spleen holds a reserve of extra red blood cells, normally to slowly replace cells as they get worn out or in case of blood loss. During the dive reflex, your spleen releases those extra red cells to more efficiently carry around the oxygen you’re holding in your lungs. Your heart rate slows down and your blood vessels restrict flow. Altogether, your body uses less oxygen and moves oxygen more efficiently.
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