hair, nails, & burns mrs. halkuff: anatomy & physiology
TRANSCRIPT
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)