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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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.
Cyanide works by making the human body unable to use oxygen.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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