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Hair is a protein filament that grows from follicles found in the dermis.Hair is one of the defining characteristics of mammals.The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair.
Scalp hair was reported to grow between 0.6 cm and 3.36 cm per month. The growth rate of scalp hair somewhat depends on age (hair tends to grow more slowly with age), sex, and ethnicity. [3] Thicker hair (>60 μm) grows generally faster (11.4 mm per month) than thinner (20–30 μm) hair (7.6 mm per month). [4]
[1] A hair follicle consists of : The papilla is a large structure at the base of the hair follicle. [4] The papilla is made up mainly of connective tissue and a capillary loop. Cell division in the papilla is either rare or non-existent. [contradictory] Around the papilla is the hair matrix. A root sheath composed of an external and internal ...
Brush cut Marine. A brush cut is a type of haircut in which the hair on the top of the head is cut short in every dimension. [1] The top and the upper portion of the back and sides are cut the same length, generally between 1 ⁄ 4 and 1 ⁄ 2 inch (6 and 13 mm), following the contour of the head.
The high and tight as seen on a U.S. Marine. The high and tight is a military variant of the crew cut.It is a very short hairstyle, characterized by the back and sides of the head being shaved to the skin and the option for the top to be blended or faded into slightly longer hair.
Vellus hair replaces lanugo hair on a human fetus at 36 to 40 weeks of gestation. [2] The growth cycle of vellus hair is different from the growth cycle of terminal hair. At puberty, androgen hormones cause much of the vellus hair to turn into terminal hair and stimulate the growth of new hair in the armpit and the pubic area. In men, this ...
This category has the following 4 subcategories, out of 4 total. ... Human hair (15 C, 70 P) A. Animal hair (2 C, 20 P) C. Hair color (1 C, 13 P) E. Eyelash (1 C, 4 P ...
This includes facial hair, chest hair, abdominal hair, leg hair, arm hair, and foot hair. (See Table 1 for development of male body hair during puberty.) Women retain more of the less visible vellus hair, although leg, arm, and foot hair can be noticeable on women. It is not unusual for women to have a few terminal hairs around their nipples as ...
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