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Discussion :: Biology

  1. The smallest blood vessels which are one-cell thick, are called ________

    2. A.

     Vena cava
    B.

     Arteries
    C.

     Veins
    D.

     Capillaries

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    Answer : Option D

    Explanation :

    A capillary is a small blood vessel from 5 to 10 micrometres (μm) in diameter, and having a wall one endothelial cell thick. They are the smallest blood vessels in the body: they convey blood between the arterioles and venules.

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