In rabbit, the opening of coronary sinus into the left precaval vein is bound by a fold called

Valve of Thebesius

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Mitral valve

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Tricuspid valve

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Valve of eustachian

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Solution

The correct option is D Valve of Thebesius
Blood from the wall of heart is returned into the right auricle through a coronary sinus. It opens into the left precaval vein. This opening is bounded by a crescentic fold called the valve of Thebesius.

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