The passage of oxygen and nutrients to the body cells takes place at the:
A) capillaries.
B) arterioles.
C) venules.
D) carotids
A
Explanation: A) Correct. The capillaries have single-celled walls that allow passage of oxygen and nutrients.
B) Arterioles are small arteries.
C) Venules are small veins.
D) The carotid arteries are larger arteries in the neck.
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