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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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).
The human body produces and destroys 15 million blood cells every second.
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.