1. Hair, Nails, & Burns Mrs. Halkuff: Anatomy & Physiology

2. Hair Structure Hair Bulb Root Medulla: inner central core Cortex: surrounds medulla Shaft: projects from the skin Cuticle: outermost layer; covers cortex) Arrector Pili: Muscle that is attached to hair follicle (goosebumps)

3. Hair Types Wavy Hair: Hair shaft is OVAL Curly/Kinky Hair: Hair shaft is FLAT or RIBBON-LIKE Straight Hair: Hair shaft is perfectly ROUND

4. Nail Structure Free Edge Nail Plate (top) Nail Bed (underside) Lunula Nail Fold (Cuticle) Nail Matrix

5. Skin Infections Athletes Foot: Fungus infection on the feet. Boils: Inflammation of hair follicles Cold Sores: Fluid- filled blisters usually around the nose or mouth.

6. Contact Dermatitis: Itching redness, & swelling due to an allergy. Impetigo: Pink, water-filled lesions around mouth & nose. Psoriasis: Reddened epidermal lesions covered with dry silvery scales

7. Burns Rule of Nines: Divides the body into 11 areas each accounting for 9% of total body surface. Head = 9% Chest and abdomen = 18% Upper/mid/low back and buttocks = 18% Each arm = 9% Groin = 1% Each leg = 18% As an example, if both legs (18% x 2 = 36%), the groin (1%), and the chest and abdomen (18%) were burned, this would involve 55% of the body.

8. Burns Burns are serious because victims lose fluids and this affects all body systems. Skin is sterile for 24 hours after a severe burn, but after that bacteria and fungi begin to invade.

9. 1 st Degree Burns Only the epidermis is damaged Area is red & swollen Usually heals within 2-3 days Ex. Sun burns

10. 2 nd Degree Burn Involves injury to the epidermis & upper dermis region Skin is red with painful blisters Regeneration of the epithelium can occur Usually no permanent damage

11. 3 rd Degree Burn Destroys the entire thickness of skin Burned area appears blanched (gray/white) Not painful b/c nerve endings are destroyed Regeneration is not possible (skin graphing)