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In Biology / Senior High School | 2025-07-24

What is the structure and function of the heart valves?

Asked by SecretUser9615

Answer (1)

The heart valves are flap-like structures inside the heart that ensure blood flows in one direction. They prevent the backflow of blood during the pumping process and help maintain proper circulation through the heart and the rest of the body.There are four main valves in the heart:Tricuspid valve – Located between the right atrium and right ventricle.Pulmonary valve – Between the right ventricle and pulmonary artery.Mitral (bicuspid) valve – Between the left atrium and left ventricle.Aortic valve – Between the left ventricle and aorta.Structure:Each valve is made of cusps or leaflets that open and close with pressure changes in the heart chambers.Valves are thin but tough, made of connective tissue, and anchored by chordae tendineae and papillary muscles (especially in AV valves) to prevent them from inverting.Function:During contraction (systole), valves open to allow blood to pass to the next chamber or artery.When the chamber relaxes (diastole), valves close to prevent backflow.Proper valve function is essential for efficient and unidirectional blood flow. If a valve is damaged (as in stenosis or regurgitation), it can lead to heart murmurs, fatigue, or more serious conditions like heart failure.

Answered by dapperdazzle | 2025-07-25

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