“Human Physiology” is a free online course on Janux that is open to anyone. Learn more at .

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Dr. Heather R. Ketchum is an Associate Professor of Biology.

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  1. XxL0SANG3L0SxX

    I’d like to know too why Glycogen is useful! :)

  2. Lily

    Glycogen? Energy for after implantation? I would like to know please. Thank