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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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).
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.