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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
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.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.