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  1. Which is the innermost layer of the heart?

    2. A.

     Epicardium
    B.

     Endocardium
    C.

     Myocardium
    D.

     Pericardium

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    Answer : Option B

    Explanation :

    The inner layer of the heart wall is the endocardium, composed of endothelial cells that provide a smooth, elastic, non-adherent surface for blood collection and pumping.

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