Question

a write about apperture and values of human heart ?​

Answer 1

Answer:

The valves in the heart allow the flow of blood only in one direction,i.e., from the atria to ventricles and from the ventricles to the pulmonary artery or aorta.

The opening between the right atrium and the right ventricle is guarded by a valve formed of three muscular flaps or cusps, the tricuspid valve, whereas a bicuspid or mitral valve guards the opening between the left atrium and the left ventricle.

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Answer 2

Explanation:

Human heart valves are remarkable structures. These tissue-paper thin membranes attached to the heart wall constantly open and close to regulate blood flow (causing the sound of a heartbeat). This flexing of the tissue occurs day after day, year after year. In fact, the tissue withstands about 80 million beats a year, or 5 to 6 billion beats in an average lifetime. Each beat is an amazing display of strength and flexibility.

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