1. What is the largest organ in the human body?

2. Skin

3. Skin Serves Many Functions
Protects the body from invaders.
Keeps important things in.
Prevents loss of water
Maintain temperature
Gathers information about your environment.
Skin cells produce Vitamin D

4. What Does Your Skin Look Like?
Three main layers:
Epidermis
Dermis
Layer of fat.

5. Epidermis The outermost layer. Thinnest layer Dead Skin Cells
Contains no nerves or blood vessels.
That is why shallow scratches don’t bleed or hurt.

6. Epidermis Every 28 days we lose a layer of skin.
Most important part of protection
Dead cells don’t feel pain
Calluses
Create fingernails
Produces “melanin”

7. Dermis Contains the nerves, blood vessels, and live skin cells.
Sweat Glands
Hair Follicles
Pores

8. Hair follicle Sweat glands Sweat pore Where hair grows from
Where “sweat” is made
Sweat pore
Where sweat comes out on the surface of the skin

9. Sebaceaus Glands
Produce an oil called “sebum”
Our waterproofing.
Ever wonder why you wrinkle after you have been in the tub or swimming for a long time?
Why do they really wrinkle?