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So hey guys, so I'm going to be doing a little thing for you all called doing an anatomy
project thats worth a good portion of your grade and you really don't have the time to be making a big
giant model like some people are doing so you decide to do a video you think is hilarious and creative in fact but it probably... really...
isn't... And you really don't have the time to be making a big giant model like some people
ANYWAY
So let's doodle up a little diagram shall we?
Here's a cube. What do you think it is going to be? Well before you answer a cube is always going to be a
cube, so we're just going to pretend that it's going to be something else for this. Now let's pretend by some
means you find a way to take out a little cube of your skin then blow it up to the size
of your head. Big cube. Yes. That's this cube right here. And in this cube we'll find the
INTEGUMENTARY SYSTEM. ... Fun.
So now we're going do what majority of society does upon seeing something new and that we
don't understand, and that is give it a label. We're gonna divide this into a few different parts: epidermis,
a little bit below that the papillary layer, dermis, the reticular
layer, and hypodermis. Yay.
Alright so in this big pile of dermis is going to be a ~hair~. This hare goes down and into
the rabbit hole and makes a cozy little home. Plants its roots. This little shaft right
here is called the hair shaft. When we go a little deeper to discover who this hair
truley is, we're just going to slap another label onto it and call the stuff under the
skin the hair follicle. This little thing? The hair root. It's heritage. It's beginnings.
It's what forms the hair itself.
Now it turns from a hare into a cute little tree. Haha! Ha. Haaa.
Well
See now, this little hair is enjoying its life of slouching and being relaxed and worry
free. Maybe they have some friends who show up in their life but then are brutally murdered
by a laser or three little blades that are going across the skin and are just left behind. So sad. But at one point
in this hair's little life, it's going to snap to attention and be standing straight
up. You may be able to relate to this feeling of suddenly paying attention out of fear or
some other cold feeling when a certain teacher tosses their marker at a board and walks out of the
classroom saying they quit out of blind fury due to your inattentiveness.
: )
It stands straight up thanks to a thing called the Arrector pili muscle! In addition to the arrector pili muscle,
there's another thing around the hair folicle called the sebbacous glands. These little
things make oils called sebum that make the hair lubricated.
Now sometimes, and by sometimes I mean a lot, people sweat. This sweat comes from two different
little glands scattered through the skin called Eccrine sweat gland, and a different gland
called the apocrine gland, which I don't have to label so I won't be talking about it much.
Just know that apocrine glands make gross stinky sweat and eccrine makes that sweat
that may stink if you've eaten somethin' funky, but generally just cools the body down. The
sweat from the eccrine glands comes out from a, surprise, sweat pore.
So there's also little thing called nerves, that this video is probably metaphorically
getting on yours by my horrible attempt at being funny. Attached around the hair follicle
is something called the root hair PLEXUS. It sounds exciting and it really is! Each
forms a network around a hair follicle and is a receptor; it sends nervous impulses to
the brain when the hair moves. Attached to the plexus is a bunch of little free nerve
endings. These two things along with sensory nerve fiber let you feel the little crawly
things like an ant along the skin or someone being uncomfortably close to you and invading
your personal space when you really wish they wouldn't. There's one more nerve ending in
the skin that goes by the name of the Pacinian corpuscle. It's nothing exciting really, it
helps the skin feel vibrations and pressure.
So at the lowest of the low of this little cube is something called adipose tissue. It's
that gross looking yellow stuff that makes the skin a bit stretchy. Meshed along in this
layer of the skin is a vein and artery with at least 4 branches. The veins and arteries
both transport blood along the skin.