6. Which of the four muscular chambers of the human heart directly propels blood into the pulmonary circulation?
(A) right atrium;
(B) right ventricle;
(C) left atrium;
(D) left ventricle
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統計: A(0), B(0), C(2), D(0), E(0) #3828121
統計: A(0), B(0), C(2), D(0), E(0) #3828121