The table shows the partial pressure of carbon dioxide and oxygen in two blood vessels.
What explains the difference in the partial pressures of oxygen in the pulmonary artery and pulmonary vein?
Oxygen diffuses from the alveoli into the blood in the capillaries.
2 )
Carbon dioxide diffuses into the alveoli from the blood in the capillaries.
3 )
Oxygen diffuses from the body cells into the blood in the capillaries.
4 )
Carbon dioxide diffuses into the body cells from the blood in the capillaries.
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