Phoenix32890 wrote:Chai- OK- But the hairs are all in different stages of the cycle. Then a person shaves them off, all at once, and they all grow back, at the same time, to the same length they were before she shaved them. THAT'S what I don't get!!!
Ah...but there's the problem!
The hairs you are shaving off are NOT ALL growing back.
Only the hairs that were in the actual growth phase grow back. The hairs that are dormant don't grow, the hair shaft below the skin surface just lies there, dormant. The hairs that were in the shedding stage don't reappear either.
The thing is, the growth stage is the longest of the stages, so more hairs are in that stage at any given time.
If you were to mark the spots on your skin where the follicles are, then shave that area, you'd see that not all of them would grow back. Most, but not all. If you let the area alone, you would see after a while that hairs are starting to grow out of follicles you hadn't even marked. There's just so many of them it looks like they are all growing back.
The hair on your head is a good example, because it's grow phase can be years. However, when you brush your hair, you see that you lose a bunch of hairs every day, yet you do not go bald. There's always hairs that are just starting to grow, to replace the ones that just shed.
I guess that's why, if you never get your hair cut, it starts looking shaggy or fuzzy, it better shows that there's hair of all different lengths all over your head. Keeping your hair trimmed hides that.