1. Skin Integumentary System

2. Protection against infection, foreign agents Protection against dehydration & secretion of salts & water Regulation of body temperature Collection of sensory information Synthesis of vitamin D; Storage of lipid reserves 5 Main Functions of Skin

5. Nerves in the Skin Merkels’s Disks Pacinian corpuscle Free Nerve endings Hair Follicle ending

7. Epidermis

8. Skin Color

9. Dermis

11. Subcutaneous Layer

14. Skin Disorders

15. Lesions

16. Psoriasis Ringworm - Tinea

17. Burns

20. ABCDE Method to Screen for Melanoma A … Asymmetry (lopsided) B … Border irregularity (edges are ragged, blurred or irregular) C … Color variation (color uneven, may include shades of black, brown and tan) D … Diameter larger than 6 millimeters E … Evolution, or changes in the lesion

22. A ¾ inch square patch of skin on the back of the hand (~ 1/20 of an inch thick) contain: 9 feet of blood vessels, 600 pain sensors, 30 hairs, 300 sweat glands, 4 oil glands, 13 yards of nerves, 9000 nerve endings, 6 cold sensors, 75 pressure sensors How many of each of these are in the skin on your hand?