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Did you know?
The average adult has about 21 square feet of skin.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.