How are muscles supplied with oxygen during exercise?
In: Biology
The right ventricle of the heart pumps blood into the lungs, where it releases carbon dioxide and absorbs oxygen. And then goes back to the heart and is pumped out by the left ventricle enter the arteries, and from there into the capillary beds. These capillary beds run through everything that needs to be serviced, including muscles. Then the blood, depleted of oxygen and rich in carbon dioxide, flows from the capillary beds into the veins and back to the heart again.
So the muscles merely work, producing carbon dioxide that they released into the bloodstream through those capillary beds, and absorbing oxygen through those capillary beds.
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