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.
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There are 60,000 miles of blood vessels in every adult human.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
The three stages of a specific immune response.
Frequency distribution curve: interpatient variability in drug response
Sexual Response Cycle
The yellow, blue, and green sections of the Emergency Response Guidebook (ERG). The yellow section ...