Rachel Carson wrote in Silent Spring, "The chemical war is never won, and all life is caught in the crossfire." Respond

i think the answer is c hope this

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

the correct answer is: " ventricles " .

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