How does hair know to grow? when to stop?

[aphex]

If its just dead cells, how does it know when it gets cut?

And how does it know when its grown long enough?

 

[Paulson]

It just grows, and i'm sure that's about all it does know...

 

[HappyPuppy]

Boring day, huh?

 

[ElFenix]

hair actually grows for a short while after death, so apparently it doesn't know when to stop.

 

[Red Dawn]

Originally posted by: aphexII
If its just dead cells, how does it know when it gets cut?

And how does it know when its grown long enough?

Come on, use that education your folks are going broke paying for

 

[aphex]

Originally posted by: HappyPuppy
Boring day, huh?

Nailed that shite right on the head. Im writing an essay as we speak, and got to staring at my arm hair.

 

[ElFenix]

Originally posted by: aphexII

Originally posted by: HappyPuppy
Boring day, huh?

Nailed that shite right on the head. Im writing an essay as we speak, and got to staring at my arm hair.

you're a hairy SOB

 

[minendo]

Originally posted by: aphexII

Originally posted by: HappyPuppy
Boring day, huh?

Nailed that shite right on the head. Im writing an essay as we speak, and got to staring at my arm hair.

Change 'writing an essay' to 'browsing porn' and 'arm' to 'nut'.

 

[aphex]

Originally posted by: ElFenix

Originally posted by: aphexII

Originally posted by: HappyPuppy
Boring day, huh?

Nailed that shite right on the head. Im writing an essay as we speak, and got to staring at my arm hair.

you're a hairy SOB

not really, my arm hair is just intriging.

 

[aphex]

Originally posted by: minendo

Originally posted by: aphexII

Originally posted by: HappyPuppy
Boring day, huh?

Nailed that shite right on the head. Im writing an essay as we speak, and got to staring at my arm hair.

Change 'writing an essay' to 'browsing porn' and 'arm' to 'nut'.

Oh how i wish, Oh how i wish.

 

[Pastore]

The hair on your arms grows extremely slow... Shave a patch off your arm and you'll see...

 

[aphex]

Originally posted by: Beast1284
The hair on your arms grows extremely slow... Shave a patch off your arm and you'll see...

I'll take your word for it.

 

Hair is in a constant state of growth. The reason why it seems to "stop" at certain lengths is because it becomes too brittle after awhile. Sometimes, it cannot even support its own length. While some people's hair is more durable than others, no hair can last forever. The durability of hair is also why you can see other people grow their hair to extreamly long lengths.

In short, no, it does not know when to stop.

 

[ElFenix]

Originally posted by: Beast1284
The hair on your arms grows extremely slow... Shave a patch off your arm and you'll see...

my cat's fur grows extremely slow... had surgery almost a year ago and its still kinda... stubbly?

 

[bizmark]

Hair grows until it reaches its stopping point, which varies from person to person and from one part of the body to the other (your scalp hair can obviously grow a lot longer than your arm hair, and women tend to be able to grow their scalp hair longer than men). Once it's reached the stopping point, it stays there for a while until it falls out, at which point a new hair starts growing from the same follicle. In fact, the new hair has already started growing by the time the old hair has fallen out.

first thing I found on google, but I've read about this before
nuther link
more
there's more info here, click "Hair Biology" on the right

BTW I do that staring-at-the-arm-hairs thing all the damn time..... and I've get a lot of ingrown ones too. That's what I always do when I'm procrastinating on homework, search my arms for ingrown hairs

 

[Tsaico]

Agree to above statement. Also, hair does not grown after death. That is just an urban legend. Cadavers are shaved before they are shipped out to schools and sometimes when they arrive, they have what looks likes fuzz when the hiar had been shaved skin close. The illusion is that as the cadaver starts to lose water content in the skin, the skin pulls back a little, thus now allowing more hair to be exposed.

 

[MomAndSkoorbaby]

The follicles die. RIP.