Why doesn’t “pubic hair” grow continuously like human hair? And why is it curly? And what color is the pubic hair of blondes?
Pubic hair is one of the characteristics of body hair that is different from hair on the head, both in terms of its length that does not increase continuously and its characteristic that it is often curly or curled. This can be explained by biological and medical principles as follows:
1. Hair Growth Cycle
All hair on the body, whether it is hair on the head, hair on the arms, hair on the legs or hair on the genitals, has a growth cycle (Hair Growth Cycle) that is divided into 3 stages:
- Anagen Phase : This is the phase where the hair grows, depending on genetics and the area where the hair grows.
- Catagen Phase : The period when hair stops growing and is ready to fall out.
- Telogen Phase : This is the period when hairs stop growing completely before new hairs start to grow in their place.
In the case of scalp hair, the anagen phase lasts for 2-6 years, allowing the hair to continue to grow unless cut. However, pubic hair has a much shorter growth period, lasting only about 3-6 months, which is why the hair in this area does not continue to grow as quickly as the hair on the scalp.
2. Curly Pubic Hair:
Pubic hair tends to be curly or curled, which can be explained by the shape of the hair follicle and the arrangement of the keratin protein, which is the แทงบอล UFABET ราคาดีที่สุด ไม่มีขั้นต่ำ main structure of the hair shaft. Curly hair is caused by the hair follicle being curved or oval-shaped. As the hair grows, the hair tends to bend according to the shape of the hair follicle.
In addition, the nature of the keratin protein also affects the twisting and curling of hairs, especially pubic hair, which has denser and more twisted keratin than hair on other parts of the body.
3. Reasons why pubic hair is curly
- Temperature regulation and protection : Pubic hair plays a role in protecting the sensitive area and regulating temperature. The curly hairs help trap air to prevent friction between the skin and provide more comfort when moving.
- Sweat and oil wicking : Curly hair also helps in the wicking of sweat and oil in the genital area, which helps in better preventing skin irritation.
People with blonde or red hair, what color is the hair there?
Pubic hair is usually a different color than the hair on your head. Although there are cases where the color of your pubic hair and hair are similar, pubic hair is generally darker than the hair on your head, due to genetics and hormones that control the growth and color of hair on different parts of your body.
In the case of blondes, pubic hair tends to be darker in color, either light brown or dark brown, depending on genetics.
For redheads, pubic hair also tends to be reddish, although it can sometimes be slightly darker, such as a reddish-brown.
The color of pubic hair and body hair is controlled by the melanin pigment produced in the body. There are two main types of melanin: eumelanin , which gives black or brown color, and pheomelanin, which gives yellow or red color. People with blonde and red hair have a higher proportion of pheomelanin, which gives the hair a natural light color.
Bottom line: Pubic hair may not always match the hair color on your head, and is often slightly darker, even in people with blonde or redheaded hair.
Related Medical Studies
There are scientific studies that describe the nature and growth of pubic hair, including research that delves into the genetics and hormonal factors that affect the appearance of pubic hair. In particular, androgens play a key role in regulating the growth and appearance of hair in areas where pubic hair is involved, such as chest hair, underarm hair, and pubic hair.
refer
- Randall, VA, & Ebling, F. J. (1991). The biology of androgenetic alopecia. New England Journal of Medicine , 324(3), 142-149.
- Stenn, K. S., & Paus, R. (2001). Controls of hair follicle cycling. Physiological Reviews , 81(1), 449-494.
- Blume-Peytavi, U., & Tosti, A. (2011). Hair Growth and Disorders . Springer Science & Business Media.