lasheafrett7865 lasheafrett7865

21-07-2020
Biology

contestada

Valves in veins are formed of the tunica media. cause venous blood flow to go in only one direction. are found only in the largest veins. make the use of a skeletal muscle pump unnecessary for venous blood flow. are the leading cause of high blood pressure.

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chaseviolette1 chaseviolette1

21-07-2020

Answer:

they get larger.

Explanation:

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