When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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There are more sensory neurons in the tongue than in any other part of the body.
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Thyroid conditions may make getting pregnant impossible.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
Decimal Point Place Values
Decimal Values as They Relate to the Location of the Decimal Point