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Pumping action of Heart

The heart is vital organ in the circulatory system which propels the blood throughout the body. The direction of blood flow through the heart is maintained by valves. The heart has four valves.

Tricuspid valve: It is also called right atrio -ventricular valve since it is located between the right atrium and ventricle. Its function is to prevent the backward flow of blood from left ventricle o Ieft atrium.

Bicuspid valve: It is also called left atrio-ventricular valve and it is located between left atrium and left ventricle. It prevent the backward flow of blood from left ventricle to left atrium.

Pulmonary valve: It is located at right ventricle and this valve is to prevent the blood from coming back to the right ventricle.

Aortic valve: It is located between the left ventricle and aorta. This prevents the return of blood back to the ventricles from aorta.

Pumping Action Of Heart:

Heart is a complex pumping organ which receives blood from different parts of the body into the atria and pumps it to the various body parts from ventricles. The heart has an intrinsic system whereby the muscle is stimulated to contract without the need for a nerve supply from the brain. Heart muscles continuously generate impulses in such a way that, causes rhythmic contraction and relaxation of heart chambers in a specific sequence. There are small groups of specialized neuromuscular cells in the myocardium which initiate, and conduct impulses of contraction over the heart muscle. This include SA node, AV node, AV bundle and Bundle of His. The SA node is often termed as ‘Pacemaker’ of heart because initiates the impulses of contraction more rapidly than other groups of neuromuscular cells. SA node stimulates the AV node through intermodal pathway. .

Author Bio: The Author of this article, Sreejith is writing articles on Biomedical Instrumentation in Electronics and Communications

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