MCAT Question A Day - 8/11/14 - Answer!
Gas exchange between the blood and tissues occurs:
A. throughout the circulatory system.
B. in the arteries, arterioles and capillaries.
C. in the systemic arteries only.
D. in the capillaries only.
D is correct. The capillaries are one cell thick and blood moves slowly to allow for efficient oxygen exchange.
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D is correct. The capillaries are one cell thick and blood moves slowly to allow for efficient oxygen exchange.
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