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Medical research on the function of ear hair is currently very scarce. Hair growth within the ear canal is often observed to increase in older men, [3] together with increased growth of nose hair. [4] Excessive hair growth within or on the ear is known medically as auricular hypertrichosis. [5]
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Ear hair is the terminal hair arising from folliculary cartilage inside the external auditory meatus in humans. [1] In its broader sense, ear hair may also include the fine vellus hair covering much of the ear, particularly at the prominent parts of the anterior ear, or even the abnormal hair growth as seen in hypertrichosis and hirsutism .
[7] [6] In contrast, others indicate that there is a correlation with sexual dimorphism between men and women, where men tend to have the tubercle more than women in some populations. [3] Two studies indicate that older men tend to have greater expression of Darwin's tubercle than do older women.
It was previously thought that Caucasian hair grew faster than Asian hair and that women's grew faster than men's; [3] but newer research shows that the sexes do not differ significantly in speed of hair growth [5] and that the hair of Chinese people grows faster than that of French Caucasians and West and Central Africans. [6]
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Humans inhabit hot climates, both dry and humid, and have done so for millions of years. Selective use of clothing and technological inventions such as air conditioning allows humans to live in hot climates. One example is the Chaamba, who live in the Sahara Desert. They wear clothing that traps air in between skin and the clothes, preventing ...