caleb8035 caleb8035

28-11-2017
Biology

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What might be the function of the muscle contraction in the walls of veins?

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abdirahman3518 abdirahman3518

29-11-2017

Contraction and relaxation of the circular muscles decrease and increase the diameter of the vessel lumen. Specifically in arteries decreases blood flow as the muscle in the walls contracts, making the lumen narrower and increasing blood pressure.

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