Terminal hair

Source: Wikipedia, the free encyclopedia.
This article is about the visible hairs that cover some areas in humans. For the hair coverage in non-human mammals, see fur.
Comparison of the vellus hair (left) to the terminal hair (right) in humans. Notice the presence of subcutaneous tissue on the thicker terminal hair.

In humans, terminal hair is a variant of hair that is thick and long such as that growing on the scalp, as compared with vellus hair, colloquially known as peach fuzz, growing elsewhere.[1][2] During puberty, the increase in androgenic hormone levels causes vellus hair to be replaced with terminal hair in certain parts of the human body.[3] These parts will have different levels of sensitivity to androgens, primarily of the testosterone family.[4]

The

foot hair.[7] Human females on the other hand generally retain more of the vellus hair.[8]

These hairs are present in the large apes but not in the small apes like gibbons and represent an evolutionary divergence.

better source needed
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See also

References

  1. ^ "What is meant by the terms vellus hair and terminal hair?". www.wfmj.com. 5 December 2019.
  2. ISBN 1-4160-3185-5
  3. ^ Hiort, O. "Androgens and Puberty". Best Practice & Research Clinical Endocrinology & Metabolism, Vol. 16, No. 1, pp. 31–41.
  4. ^ Neal, Matthew; Lauren M. Sompayrac. How the Endocrine System Works. Blackwell Publishing, 2001, p. 75.
  5. ^ Randall, Valerie A.; Nigel A. Hibberts, M. Julie Thornton, Kazuto Hamada, Alison E. Merrick, Shoji Kato, Tracey J. Jenner, Isobel De Oliveira, Andrew G. Messenger. "The Hair Follicle: A Paradoxical Androgen Target Organ", Hormone Research, Vol. 54, No. 5–6, 2000.
  6. ^ Heffner, Linda J. Human Reproduction at a Glance. Blackwell Publishing, 2001, p. 33.
  7. ^ Robertson, James. Forensic Examination of Hair, CRC Press, 1999, p. 47.
  8. ^ Neal, Matthew; Lauren M. Sompayrac. How the Endocrine System Works. Blackwell Publishing, 2001, pp. 70, 75.
  9. ISBN 9781629013725
    .
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