The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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There are 20 feet of blood vessels in each square inch of human skin.
Signs of hypocalcemia and hypoparathyroidism; A, Chvostek's sign; B, Trousseau's sign.
The universal choking sign.
To test the normally open contacts, connect one meter lead to terminal 30 and the other lead to ...