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Terminal hair

Comparison of the vellus hair (left) to the terminal hair (right) in humans. Notice the presence of subcutaneous tissue on the thicker terminal hair.

Terminal hairs are thick, long, and dark, as compared with vellus hair.[1] During puberty, the increase in androgenic hormone levels causes vellus hair to be replaced with terminal hair in certain parts of the human body.[2] These parts will have different levels of sensitivity to androgens, primarily of the testosterone family.[3]

The pubic area is particularly sensitive to such hormones, as are the armpits which will develop axillary hair.[4] Pubic and axillary hair will develop on both men and women, to the extent that such hair qualifies as a secondary sex characteristic,[5] although males will develop terminal hair in more areas. This includes facial hair, chest hair, abdominal hair, leg and arm hair, and foot hair.[6] Human females on the other hand can be expected to retain more of the vellus hair.[7]

Footnotes

See also

de:Terminalhaar nl:Terminaal haar sv:Terminalh r






Source: Wikipedia | The above article is available under the GNU FDL. | Edit this article



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