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H. Harris, publishing in the British Journal of Dermatology in 1947, wrote Native Americans have the least body hair, Han Chinese people and black people have little body hair, white people have more body hair than black people and Ainu have the most body hair. [18] Anthropologist Arnold Henry Savage Landor described the Ainu as having hairy ...
Dihydrotestosterone (DHT, 5α-dihydrotestosterone, 5α-DHT, androstanolone or stanolone) is an endogenous androgen sex steroid and hormone primarily involved in the growth and repair of the prostate and the penis, as well as the production of sebum and body hair composition.
Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.
It functions as a metabolic intermediate in the biosynthesis of the androgen and estrogen sex steroids both in the gonads and in various other tissues. [ 4 ] [ 8 ] [ 9 ] However, DHEA also has a variety of potential biological effects in its own right, binding to an array of nuclear and cell surface receptors , [ 10 ] and acting as a ...
A small blood sample is sufficient as test material. In the past, the observation of the Barr body was common practice, as well. [47] To investigate the presence of a possible mosaicism, analysis of the karyotype using cells from the oral mucosa is performed. Physical characteristics of a Klinefelter syndrome can be tall stature, low body hair ...
The formation of goose bumps in humans under stress is a vestigial reflex; a possible function in the distant evolutionary ancestors of humanity was to raise the body's hair, making the ancestor appear larger and scaring off predators. [73] [72] Raising the hair is also used to trap an extra layer of air, keeping an animal warm. [72]
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Hair removal is the deliberate removal of body hair or head hair. This process is also known as epilation or depilation . Hair is a common feature of the human body, exhibiting considerable variation in thickness and length across different populations.