Question

oxygen - poor blood passes through the multiple choice right av (tricuspid) and pulmonary valves right av (tricuspid) valve only left av (mitral) and aortic valves left av (mitral) valve only pulmonary and aortic valves

Explanation:

Oxygen - poor blood enters the right atrium of the heart, then passes through the right atrioventricular (tricuspid) valve into the right ventricle. From the right ventricle, it passes through the pulmonary valve to the pulmonary artery for oxygenation.

Answer:

A. right AV (tricuspid) and pulmonary valves