A red blood cell that is flowing through the aorta would pass through ________ heart valves before reaching the right ventricle.

Question

Quizplus · Accepted Answer

A red blood cell in the aorta would first pass through the aortic valve to leave the heart, then enter systemic circulation. To return to the right ventricle, it would pass through two more valves: the tricuspid valve, after returning via the venae cavae, and the pulmonary valve, after leaving the right ventricle and returning from the lungs via the pulmonary veins. This totals three valves: aortic, tricuspid, and pulmonary.

A Red Blood Cell That Is Flowing Through the Aorta