Nipple, supernumerary
An extra nipple. Supernumerary nipples are usually smaller than normal and vestigial (nonfunctional, without accompanying mammary glands). They tend to occur along a roughly curved line that extends from near the armpit, through the center of the normal breast, and down to the lower abdomen. This distribution is very similar to the location of nipples on mammals that have multiple nipples along the underbelly. Supernumerary nipples do not cause problems and do not need to be removed.
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(b. 1927) American biochemist who shared the 1968 Nobel Prize in Physiology or Medicine for his work in deciphering the genetic code. Marshall Warren Nirenberg was born in New York City. In 1941, Marshall developed rheumatic fever, and the Nirenberg family moved to Orlando, Florida, to take advantage of the subtropical climate. During his teens, […]
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Nits are lice eggs. They are hard to see and are often confused with dandruff or hair spray droplets. Nits are found firmly attached to the hair shaft. They are oval and usually yellow to white. Nits take about a week to hatch. All nits must be removed to prevent reinfestation with lice. They can […]
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It acts as a vasodilator (blood vessel relaxant). It therefore controls blood flow to tissues. It regulates the binding and release of oxygen to hemoglobin. It thereby controls the supply of oxygen to mitochondria (cell powerhouses that generate energy). It kills parasitic organisms, virus-infected cells, and tumor cells (by inactivating respiratory chain enzymes in their […]
- Nitrogen
Liquid nitrogen; Nitrogen narcosis.
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