|
|
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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).
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.