Question

What will happen if there are no valves in the heart?

Answer 1

Hint: The heart valves and the chambers are lined with endocardium. Heart valves separate the atria from the ventricles, or the ventricles from a blood vessel.

Complete Answer:
To answer this question, we have to know about the heart valves. A heart valve is a one-way valve that normally allows blood to run in only one way via the heart. The four valves are usually described in a mammalian heart that determines the pathway of blood flow through the heart. A heart valve opens or closes incumbent on differential blood pressure on each side.

The four valves in the mammalian heart are:
- The two atrioventricular (AV) valves are the mitral valve (bicuspid valve) and the tricuspid valve, which are between the upper chambers (atria) and the lower chambers (ventricles).
- The two semilunar (SL) valves are the aortic valve and the pulmonary valves that are in the arteries depart from the heart.
- The mitral valve and the aortic valve are in the left heart; the tricuspid valve and the pulmonary valve are in the right heart.
- The valves present in the heart allow the transfer of blood only in one way from atria to the ventricles from the ventricles to the pulmonary aorta. These valves inhibit any reverse flow. If there will be no valves, all the backflow will not be prevented and it will get disturbed.

Fig- heart valves.

Note: Heart valves are situated around the fibrous rings of the cardiac skeleton. The valves include flaps known as leaflets or cusps, alike with a flutter valve or duckbill valve that are pressed open to permit blood run and which then block together to seal and stop reverse flow. The others have three but the mitral valve has two cusps. There are nodules present at the heads of the cusps which give tightness to the seal.