Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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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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On average, the stomach produces 2 L of hydrochloric acid per day.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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Your heart beats over 36 million times a year.
A typical oil pressure sending unit on a Ford V-8.
A typical belt-driven AIR pump. Air enters through the revolving fins behind the drive pulley. The ...