Question

What would happen if the valves separating the chambers in a person's heart did not close?

Answer 1

The volume of blood pumped from the ventricles to the body would increase because blood would flow without restriction from the atria

Answer 2

Answer:

The volume of blood pumped from the ventricles to the body would be reduced because blood would backflow into the atria.

Explanation:

The valves which are separating the chambers in the heart are known as tricuspid and bicuspid valves. These valves are present between atria/atrium and ventricles that is why they are also know as atrioventricular valves . Their basic function is to prevent the backflow of blood from ventricles to atria. The backflow may occur when the ventricles are full of blood and they contract. At this point of time, the blood may either move out of heart to aorta or back to the atrium but closing of valves do not let this blood to backflow so that maximum blood could be pumped to the body. But if the valves will not close then during ventricular contraction, some blood will move back to atrium and hence comparatively less blood will be pumped towards the body.