Hair, Nails, & Burns

Mrs. Halkuff:

Anatomy & Physiology

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)

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

                                                                                              

Nail Structure

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

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.

                                                                                                                                               

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

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.

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.

1st Degree Burns

Only the epidermis is damaged

Area is red & swollen

Usually heals within 2-3 days

Ex. Sun burns

2nd 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

3rd 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)