Choose the Most Correct Statement Concerning Capillaries

Choose the most correct statement concerning capillaries.

A) Networks of capillaries are called capillary nets.
B) Almost all capillaries are open at the same time.
C) The site of nutrients, gas exchange, and waste exchange is the capillaries.
D) Precapillary sphincters contract to increase capillary flow.
E) The walls of capillaries contain smooth muscle.

Correct Answer:

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