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"Lub' sound of heart beat is louder than...

"Lub' sound of heart beat is louder than 'Dubb'heart sound. Why?

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### Step-by-Step Solution: 1. **Understanding Heart Sounds**: The heart produces two main sounds during its cycle, commonly referred to as "Lub" and "Dubb". These sounds are associated with the closing of heart valves. 2. **Identifying the 'Lub' Sound**: The 'Lub' sound is the first heart sound (S1) and is produced by the rapid closure of the atrioventricular (AV) valves. These valves are located between the atria (upper chambers) and the ventricles (lower chambers) of the heart. 3. **Types of Atrioventricular Valves**: In the human heart, the AV valves include the tricuspid valve (between the right atrium and right ventricle) and the bicuspid (or mitral) valve (between the left atrium and left ventricle). ...
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