Many strange things happen in our bodies without our realizing it. One of those things is that head hair usually grows more densely than body hair!
Perhaps you did not notice this fact before, even though it is as clear as the eye of the sun! Are hair follicles in the head different from the rest of the body?
Why does head hair grow faster and thicker than hair on hands and legs?
Every hair in the human body grows from its own follicle. Inside the follicle, new hair cells form at the hair root.
When the cells form, they push the old cells out of the follicle, and these cells die and become the hair we see growing.
The follicle will produce new cells for a certain period of time depending on where they are in the body. This period is called the growth phase, then it will stop for a period of time (the resting period), and then grow again.
When the hair follicle enters the resting phase, the hair shaft breaks, and thus the existing hair falls out and is replaced by a new hair.
Therefore, it is the duration of the growth phase that determines the maximum length that a hair can reach.
The cells that grow hair on your arms are programmed to stop growing every two months, so the hair on your arms stays short.
On the other hand, the hair follicles on your head are programmed to allow hair to grow for years at a time, so hair can grow long.
This explains the growth of head hair at a dense pace, unlike the hair of the rest of the body!
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