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A LITTLE SOMETHING WORTH KNOWING

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ScienceOne small ahaBody system

This blood cells help defend against infection.

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Your new ahaWhite blood cells

White blood cells include several kinds of immune cells. Source: White blood cells ↗

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More from Human Body

A few more worth knowing.

  1. 11Platelets help blood perform this action to seal a damaged vessel.RECALL
    Clot

    They gather at damaged vessels

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  2. 12This protein carries oxygen in red blood cells.RECALL
    Hemoglobin

    It contains iron

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  3. 13This artery carries blood away from the heart to the body.RECALL
    Aorta

    The body's largest artery

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