Average number of hairs, growth rate, average lifespan
The color, shape, curvature, and cross-sectional shape of the hair differ depending on the body part, individual, and race. Koreans have black (brown) hair, but whites have less melanin, so there are many colors of brown, yellow, and red.
1. Number of hairs
Human body 1.3 ~ 1.4 million
Hair depends on hair color, but usually 100,000
hairs and about 30,000 beards
2. Hair shape
Straight (Asian), wavy (Western), spherical (black)
3. Hair Thickness
Average hair 01.mm
Hair soft hair 0.005mm
Hair terminal 0.02mm
4. Growth direction
a. Corresponds to the direction of the secant of the skin and protrudes outward from the skin surface.
me. Wool is different for different body parts.
Whorl - axillary, parietal region, pubic hair, red pepper line
head (cowlick) - hair extended above the forehead hairline
Body hair 24 to 25 degrees
Eyebrows -90 degrees
5. Growth rate
Hair - 0.2 to 0.5mm/day, 1.2 cm/month, 12-13cm/year
Beard - 0.4mm/day, 14cm/year
6. Lifespan of hair
hair Hair - Average 2 years and 6 months
Eyebrows - 100 miles - 150 miles (4-5 months)
Male - 2-4 years , Women -
Natural hair loss for 3-5 years - Hair (80 ~ 100 pieces/day, 1.5 million pieces/year)
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