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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
Did you know?
Cyanide works by making the human body unable to use oxygen.
Did you know?
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.