| Hair,
Hair Everywhere
By Sandie Lee
Hair. Whether it’s long or short, curly or spiky, we all have
it in one form or another. But no matter its style, everyone’s
hair shares one quality...
Hairy
Cells
To know more about hair
we have to start at the beginning. As most living things, a hair
starts out as a cell. The cells live inside small tube-like pits
buried in your skin called, follicles (fol-il-cles). These are surrounded
by nerves and are constantly being fed nourishing blood. As the
cell matures, it divides and is slowly pushed up by younger cells
beneath it. While all this pushing and shoving is taking place,
a tough protein called keratin (ker-a-tin) joins in. This hardens
the cells and when they finally emerge from the skin, it’s
a hair. By this point, however, the hair shafts are so far away
from the blood supply deep inside the follicle, it’s already
dead. As gross as that may sound it’s actually a good thing.
It means pain free hair cuts.
Shape
Up, Follicles!
When your follicles become
tired, your hair falls out. In fact, we lose between 40 and 100
hairs a day. But don’t worry, you still have about 5 million
hairs all over your entire body.
Did you know follicles
are also in charge of what kind of hair you have? If your hair is
curly, your follicles will be rectangular. Wavy hair sprouts from
oval ones and round follicles give you straight hair. While they
may seem hairier, chimpanzees and humans have about the same number
of follicles.
Baby Beards
Babies don’t have
beards…or do they? Actually, they grow facial hair before
they’re born. A soft, colorless hair called, lanugo (luh-noo-goh)
grows on most of a baby’s body, starting on the face. Then
about a month before the infant’s born, it all falls out.
More
Hairy Facts
Everyone has tiny hairs
in their nose. The itty-bitty hairs way back in your nose keep it
from running all the time. They do this by sweeping the mucus back
into your throat. The small hairs near the front of your nostrils
keep things like dust and bugs from getting in.
On average your hair
grows about 6 inches a year and grows faster in the summer. The
longest hair recorded belongs to a woman in China. Her hair measures
18 feet, 5.54 inches! Now that’s some hair-y interesting
stuff!
Hair, hair everywhere.
It’s so much more than just the stuff we have to comb before
we go out.
|