120810_Why_Human Body_앞_The Human Body interior quark_R 12. 08. 20 오후 8:39 페이지 10
Skin
The Epidermis, Dermis, and Adipose Tissue
To learn all about the human body!
You’re a robot though.
Now, what’s the assignment?
Don’t worry. I’ve got all kinds of information in my head.
I can’t believe that.
Where should we start? OK, that’s it!
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Me neither!
What’s covering your body?
If you can’t, I’ll prove it to you.
Clothes. A style only I can pull off! Humph!
65r_6rn W :nea . HudBm:n앞nT
eua . HudBm:u tH y By uqa. yknRuu65i ur_i u5ruu오후u_h4ouu페이지u66
Everything looks great on me. Don’t I look like a fashion model?
She’s so conceited!
Gomji, let’s go somewhere else.
He he, I’m coming too.
She looks like a frog. I agree with you.
What covers the human body is the skin. It protects the internal organs and regulates the body temperature.
It also acts as a sensor.
Mongmong, show them what you can do.
OK!
What in the world?!
Mongmong is smarter than we are! Mongmong has entered your skin.
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65r_6rn W :nea . HudBm:n앞nT
eua . HudBm:u tH y By uqa. yknRuu65i ur_i u5ruu오후u_h4ouu페이지u65
The Structure of the Skin Pore
Hair
Look! This is your skin.
Epidermis
Sweat duct
Erecter pili muscle
Sweat gland Oil gland
Blood vessel
Hey, Doc, when you get a sunburn, a white layer peels off…
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What does it do?
Dermis
Subcutaneous Layer Hair bulb (hair root)
What’s that?
Good question! What about the dermis?
The skin is made up of the epidermis, dermis, and adipose tissue.
(adipose tissue)
There’s a lot of stuff in the dermis…
That’s the epidermis. There’s no blood vessel in the epidermis, so it doesn’t bleed.
What we normally call skin is the dermis, the most important part of skin.
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People sweat to adjust body temperature and discharge waste at the same time.
Oil glands not only protect the skin so it doesn’t dry up, but also prevent germs from entering.
They all have roles!
I want to get in!
What does hair do?
I don’t like the hair on my arm.
The Role of Hair When It’s Hot The hair bends down, enlarging the pores so more sweat can come out. It also lets heat out.
When It’s Cold The hair stands straight, narrowing the pores to keep heat from leaving the body.
The hair regulates body temperature as well. You get goosebumps when you’re cold, right?
Maybe I want to be a goose.
The bumps appear to keep heat inside as well.
He’s so immature!
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eua . HudBm:u tH y By uqa. yknRuu65i ur_i u5ruu오후u_h4ouu페이지u69
I can answer that.
Why is Omji’s skin so fair, when mine’s dark?
Humph!
Don’t you know?
I’m Snow White. That’s why.
I’m so nice.
When will she ever stop!
No, it’s because of melanin in the epidermis. Skin colors vary depending on the activity of
So the less active they are, the better.
Well, we’ll see about that.
But I’m her only friend. I should put up with her.
melanin cells, which create melanin. The more active they are, the darker the skin.
The sun has UV rays in it. Too much UV exposure can be harmful, even causing skin cancer in some people.
UV rays
Oh, no, UV rays!
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The skin
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Melanin gathers at the epidermis to block UV rays. That’s why the skin gets dark.
So the less melanin there is, the more easily the skin is damaged.
I guess fair skin isn’t all that great.
UV rays Melanin rmis
e The Epid
Let’s cooperate to block UV rays. Now you know why people in the tropics have dark skin.
To protect the skin, right?
People with dark skin must not get skin cancer easily.
You could say that.
Right. People in less sunny areas have fair skin. But fair skin
Will you stop all that Snow White rant?
Doc, what does the subcutaneous layer do?
lets the sun pass through easily, facilitating the formation of vitamin D.
Let’s change the subject!
It stores nutrients, maintains body temperature, and absorbs shocks.
Being Snow White isn’t all that great after all.
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When people eat more than they need, extra nutrients are stored.
The extra nutrients turn into adipose tissue in the subcutaneous layer.
But, if you consume too much food, too much adipose tissue builds up.
It wasn’t me. It was Mongmong.
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If you consume just enough food, you’ll have just enough adipose tissue.
What’s happening to me?
Turn me back into myself!
He’s turning into a pig!
Ha ha, that was great.