Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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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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Thyroid conditions may make getting pregnant impossible.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
The cladistic approach from molecular genetic data
Adult moths oviposit within stems of Solidago, forming (b) galls.