1. Chapter 11 Lesson 6
The Skin
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2. Function and Structure of the Skin
The skin has two layers that help to:
Regulate body temperature
Eliminate waste
Gather information about the environment
Produce vitamin D

3. Protecting the body
The skin forms a barrier that keeps harmful substances out

4. Maintaining Temperature
If you become too warm blood vessels in your skin enlarge The widened vessel allows more blood to flow through them and body heat to escape into the environment. Sweat glands produce perspiration to cool skin if you get cold, blood vessels contract; reduces blood flow to skin & helps body conserve heat

5. Eliminating Wastes
Skin eliminates waste when you perspire
Perspiration contains dissolved waste materials

6. Producing Vitamin D
Some skin cells produce vitamin D in the presence of sunlight
Vitamin D helps absorb calcium (healthy bones)
We need sunlight each day to produce enough vitamin D

7. The Skin 11.6
Structures of the Skin

8. What is the outer layer of the skin called?
epidermis

9. melanin
What is a pigment that provides color to the skin and is produced in the deep layers of the epidermis?

10. dermis
What is the inner layer of the skin that is above the fat layer and includes the nerves, blood vessels, sweat glands, hair, and oil glands?

11. What are
the openings in your skin that allow sweat to reach the surface?
PORES

12. FOLLICLE Where the strands of hair within the dermis grow.
Oil around the __________ keep the surface of the skin moist and hairs flexible.