1. Skin Functions (pg 8)

2. Protection
Skin protects underlying tissue from mechanical, chemical, and thermal injury

3. Protection
Skin protects underlying tissue from mechanical, chemical, and thermal injury
Keratin waterproofs the cells, preventing fluid loss and gain through the skin

4. Protection
Skin protects underlying tissue from mechanical, chemical, and thermal injury
Keratin waterproofs the cells, preventing fluid loss and gain through the skin
Skin provides the first line of defense against bacteria and other pathogens

5. Protection
Skin protects underlying tissue from mechanical, chemical, and thermal injury
Keratin waterproofs the cells, preventing fluid loss and gain through the skin
Skin provides the first line of defense against bacteria and other pathogens
Melanin absorbs UV light

6. Sensory Reception
Dermis contains sense receptors for heat, cold, pain, touch, and pressure

7. Sensory Reception
Dermis contains sense receptors for heat, cold, pain, touch, and pressure
Receptors clustered around hair follicles can detect if the hair moves

8. Temperature Regulation
Skin regulates body temperature in 2 ways:
Sweat glands
Dilation and constriction of blood vessels in the dermis

9. Negative Feedback Blood vessels dilate Sweat glands become active
Body temp rises
Above normal
Body heat is lost to surroundings
And body temperature decreases
Normal Body Tempature 98.6 F

10. Negative Feedback Blood vessels dilate Sweat glands become active
Body temp rises
Above normal
Body heat is lost to surroundings
And body temperature decreases
Normal Body Tempature 98.6 F
Body heat is conserved
And body temperature increases
Body temp falls below normal
Blood vessels constrict
Sweat glands become inactive

11. Synthesis of Vitamin D
Skin cells contain a precursor molecule that is converted to vitamin D when exposed to UV light

12. Synthesis of Vitamin D
Skin cells contain a precursor molecule that is converted to vitamin D when exposed to UV light
Vitamin D is essential for bone mineralization

13. Synthesis of Vitamin D
Skin cells contain a precursor molecule that is converted to vitamin D when exposed to UV light
Vitamin D is essential for bone mineralization
Limited sun exposure can lead to vitamin D deficiency, which can result in osteoporosis and other chronic disorders

14. Output (pg 9) Write a song about the functions of the skin
Must be at least 10 lines long
Give the song a title and say what it is to the tune of