The coronary sinus in the heart is situated along its

  • A

    Left margin

  • B

    Right margin

  • C

    Diaphragmatic surface

  • D

    Lower boarder of the heart

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Valves are necessary in veins but not in arteries because

 Give the location of tricuspid valve

The heart continuous beating normally even when its nervous supply is completely obliterated because it is

Definition / Explanation :

$(1)$ $AV$ valve (Tricuspid) 

$(2)$ Mitral (Bicuspid) valves 

What is called Mitral valve?