What happens when muscular walls of arteries and veins contract?\nOptions:\n- (A) connection\n- (B) It expands\n- (C) Dehydration\n- (D) construction\n- (E) forces\n- (F) massive damage\n- (G) constriction\n- (H) contraction OK. Let's think hard:
User
Constriction occurs when the muscular walls of blood vessels contract. Arteries and veins are blood vessels. Constriction happens when the muscular walls of arteries and veins contract.
So, the final answer is (G).
Assistant