Examlex
Which of the following statements is TRUE?
Precapillary Sphincters
Circular muscular valves located at the entrance of capillaries, regulating blood flow into the capillary beds according to the body's needs.
Tunica Media
Middle, usually muscular, coat of an artery or another tubular structure.
Capillary Beds
Networks of capillaries, the smallest blood vessels, that facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues.
Precapillary Sphincters
Circular muscular valves located at the entrance of capillary beds, controlling blood flow into those beds.
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