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This is an illustration demonstrating the Wolfsdorf Staging for axillary hair development in children. [1] [2]Underarm or axillary hair goes through four stages of development, as staged by the Wolfsdorf Axillary Hair Scale, [2] driven by weak androgens produced by the adrenal in males and females during adrenarche, and testosterone from the testicle in males during puberty.
Arm hair. Arm hair grows on a human's forearms, sometimes even on the elbow area, and rarely on a human's bicep, triceps, and/or shoulders. Terminal arm hair is concentrated on the wrist end of the forearm, extending over the hand. Terminal hair growth in adolescent males is often much more intense than that in females, particularly for ...
It is commonly stated that hair grows about 1 cm per month on average; however reality is more complex, since not all hair grows at once. 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]
This measurement is not precise because human hair varies in diameter, ranging anywhere from 17 μm to 181 μm [millionths of a metre] [8] One nominal value often chosen is 75 micrometres (0.0030 in), [5] but this – like other measures based upon such highly variable natural objects, including the barleycorn [9] – is subject to a fair degree of imprecision.
Polykleitos may have used the distal phalanx of the little finger as the basic module for determining the proportions of the human body, scaling this length up repeatedly by √ 2 to obtain the ideal size of the other phalanges, the hand, forearm, and upper arm in turn. [20]
The derived measures include the (mid-)upper arm muscle area ((M)UAMA), the (mid-)upper arm fat area ((M)UAFA), and the arm fat index. Although they are not directly convertible into measures of overall body fat weight and density, and research has questioned the connection between skinfold fat and deep body fat measurements, these measures are ...
As a curly gal, I know the importance of getting regular haircuts. Whether I’m looking to try a new style or I simply need a trim, a haircut is important for maintaining healthy strands, as it ...
This includes facial hair, chest hair, abdominal hair, leg and arm hair, and 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. [9]: 193 [better source needed]