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The human body produces and destroys 15 million blood cells every second.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.