問題詳情
21. Which structure prevents blood flowing back into the atria during ventricular contractions?
(A) atrioventricular valves
(B) semilunar valves
(C)sinoatrial node
(D) carotid blood shunts
(E) foramen ovale
(A) atrioventricular valves
(B) semilunar valves
(C)sinoatrial node
(D) carotid blood shunts
(E) foramen ovale
參考答案
無參考答案
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