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Biology, 13.03.2020 18:35 kordejah348

Precapillary sphinctersa. serve as valves in veins. b. are found in the tunica media. c. carry blood under high pressure. d. control the blood flow into capillary beds. e. are voluntary structures.

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Precapillary sphinctersa. serve as valves in veins. b. are found in the tunica media. c. carry blood...

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