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World Of Biology on Instagram: "Heart valve replacement 👇 Heart valve replacement is a surgical procedure where a diseased or damaged heart valve is replaced with a new one, either biological (made from animal tissue or human donor valves) or mechanical (made from artificial materials). The heart has four valves that control blood flow: 1. Mitral valve 2. Tricuspid valve 3. Aortic valve 4. Pulmonary valve Valve replacement is usually done to treat conditions like: - Stenosis (narrowing) - Regur

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