question about hair?

Question

have you ever noticed that some hair on your body only grows to a certain length? the hair on arms, eye brows, pubic hairs grow to a certain length and then stop, and dont get any longer than that until shaved or tweezed and then they grow again. why is that?

Answer 1

Hair is made by "hair-producing cells" for a certain period of time (anagen), the cells then begin to die and stop producing hair (telogen), then starts up again after a certain period of time, thus keeping most all hairs at a certain length. Depending on the length of anagen (the hair producing cycle), will determine the length of the hair on that particular part of the body.

So cutting your hair will not make it grow back thicker, but there will, in all likeliness, be hairs from the possible 5 million hairs on your body that WILL be beginning there new anagen stage (growing stage), which would explain why that seemed to KNOW when to grow back.

So the hair will always be growing back? Well with these facts you could condure up a hypothetical circumstance, such as, one day you cut your hair (facial or otherwise), and for some possible reason ALL the hairs were just entering there telogen periond (the resting period), the hair could possibly be absent for weeks.

Answer 2

My thoughts are that with each individual person, it varies. Some people actually have a disease that prevents them from growing hair, meaning they have no regeneration of hair follicles on their person. Others, who are hairy, just wax, shave, or properly maintenance themselves, this action alone reassures that they have no more hair on their person than what is needed. In reading the information, it appears that it's based on genealogy and androgen regeneration/reproduction within the body that determines that amount of body hair growth, View these sites and see for yourself so that you may attain you own understanding:

http://www.forhair.com/hair_growth.htm(technical wording)
http://en.wikipedia.org/wiki/Body_hair (definition of Androgenic hair)
http://library.thinkquest.org/26829/text-only_3-hairy_e.htmhttp://library.thinkquest.org/26829/text-only_3-hairy_e.htm (hair growth linked to how one eats, etc.)

Great question...Good luck and be Safe..(smiles)

Answer 3

since Hair is produced by dead cells, maybe those areas have less dead cells than someplace like your head.

B-Cool

Answer 4

I don't know, but good observation!
I'd like to hear the answer!