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The term is derived from ancient Greek θρίξ, thrix ("hair") and φαγεῖν, phagein ("to eat"). [2] Tricho-phagy refers only to the chewing of hair, whereas tricho-phagia is ingestion of hair, but many texts refer to both habits as just trichophagia. [3] It is considered a chronic psychiatric disorder of impulse control. [4]
Thus the host goes into water and the parasite's lifecycle completes. [13] Many of the genes the parasites use for manipulating their host have been acquired through horizontal gene transfer from the host genome. [14] There are a few cases of accidental parasitism in vertebrate hosts, including dogs, [15] cats, [16] and humans.
Autocannibalism, also known as self-cannibalism and autosarcophagy, is the practice of eating parts of one's own body. [1] [2] Generally, only the consumption of flesh (including organ meat such as heart or liver) by an individual of the same species is considered cannibalism. [3]
In fact, a protein found in human hair called L-cysteine is sometimes used as an additive to certain foods. L-cysteine is an amino acid found in keratin, which some food manufacturers use to ...
Respiratory virus season is officially here in the U.S., making it a prime time to catch a cold. And because the average adult gets two or three colds a year, you could be dealing with an ...
Humans have much less hair over their skin than most other mammals, and much of that hair is in places which they cannot reach with their own mouth. The presence of sweat glands all over the human body makes licking as a cooling method unnecessary. Nonetheless, licking does play a role for humans.
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Gongylonema pulchrum was first named and presented with its own species by Molin in 1857. The first reported case was in 1850 by Dr. Joseph Leidy, when he identified a worm "obtained from the mouth of a child" from the Philadelphia Academy (however, an earlier case may have been treated in patient Elizabeth Livingstone in the seventeenth century [2]).