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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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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
![The conduction system of the heart; traces the path of the electrical impulse that stimulates the he](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_22_09_85202259.jpeg)
![An electrocardiogram (EKG) wave, a record of the electrical signal as it moves through the conductio](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_22_09_85211006.jpeg)