hmmm

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hmmm (lemmy.world)

submitted 2 months ago by [email protected] to c/[email protected]

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[–] derpgon 38 points 2 months ago (2 children)

The moment your hair cells leave the pores on the skin of your head, they die. Thud all hair is dead.

[–] [email protected] 21 points 2 months ago (1 children)

The moment your hair cells leave the pores on the skin of your head

Even before that. You pull a hair out, and if that specific hair follicle was still growing you should see a teeny-tiny bulb at the very end. That bulb can be up to a mm beneath the skin. The widest part of that bulb is where the hair cells begin dying and drying out. By the time it shrinks down to the width of the rest of the hair (and long before it emerges from the pore), all the cells in that section are dead. Only the base of the bulb has living, growing hair cells.

[–] [email protected] 6 points 2 months ago (2 children)

Wait, I thought hair was made of keratin like nails. It's made of cells?

[–] [email protected] 8 points 2 months ago (1 children)

Are you implying that your fingernails were never cells of your body? How does that work?

[–] [email protected] 15 points 2 months ago* (last edited 2 months ago) (2 children)

Well I'll have to look it up now, but I see it as a substance produced by the body that isn't made of cells itself. Like any of the other excretions and things the body makes.

Edit: apparently both your nails and hair are mostly made of keratin, but keratin isn't produced and excreted to produce the nail and hair structures like a playdough factory like I imagined. Special cells are produced that are primarily keratin and they are added to like a chain and die/harden as they are pushed out from the body.

[–] [email protected] 3 points 2 months ago

That is absolutely fascinating. I had the same assumption.

[–] [email protected] 3 points 2 months ago

Damn, well that is interesting

[–] [email protected] 1 points 2 months ago* (last edited 2 months ago)

I'd guess both are made of cells with lots of keratin in them, though i am making this up as i go.

[–] [email protected] 5 points 2 months ago (1 children)

Gross!!!

[–] [email protected] 17 points 2 months ago (1 children)

Guys, should we tell him about skin?

[–] derpgon 2 points 2 months ago (1 children)

You mean the one where your skin cells get replaced every month or so?

[–] [email protected] 3 points 2 months ago

Or the fact that the entire couple outer layers are dead cells