Coronary sinuses opens in the right atrium, receives blood from _______.

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Solution

The coronary sinuses which drain blood in the right atrium receive blood from small, middle, great and oblique cardiac veins mainly. It also receives blood from the left marginal vein and the left posterior ventricular vein.

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Location valve

1) Opening of coronary sinus a) tricuspid valve

2) The base of pulmonary aorta b) bicuspid valve

3) The opening of inferior vena cava c) semilunar valve

4) Bet left atrium and left ventricle d) thebesian valve

5) Bet right atrium and right ventricle e) eustachian valves

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