Integumentary System

Click the link below to go to my Glog!
Then.....
Click on the Epidermis & Dermis boxes for more information (:

http://adavis93.glogster.com/glog/

What makes your skin color?
     Melanin - yellow to black pigment. This makes skin color dark or light
              Freckles result from accumulations of melanin
     Carotene - yellow to orange. found in the palms and feet
     Hemoglobin- reddish. makes skin pinkish

Sweat glands! Prevent overheating of body
    Eccrine - palms, feet, forehead
    Apocrine - axillary and anogenital areas
    Ceruminous - ear canal
    Mammary - secrete milk

Sebaceous -
found all over body
soften skin when hormones stimulate
oily secretion
responsible for acne

HAIR!
Dead keratinized cells
hard keratin
contains a medulla, cortex, cuticle
melanocytes determine color

FUNCTIONS-
maintain warmth
alert insects on skin
guarding scalp against sunlight, heat, and trauma
--We do not have hair on our palms, soles, and lips

Alopecia- hair thinning

Functions of Integumentary-
Protection
body temp regulation
dilation and constriction of dermal vessels
Cutaneous sensation
Metabolic functions - vitamin D
blood reservoir - 5% of blood volume
Excretion

Skin Cancer -
Three major types: Basal - most common, least dangerous.. surgical excision
Squamous- found on scalp, ears, lower lip. grows rapidly
 Melanoma (rare but most dangerous) - resistant to chemo
      use the ABCD rule
A: asymmetry
B: border
C: color
D: diameter

BURNS:
First degree- only the epidermis is damaged (redness, swelling, pain)
Second degree - epidermis & upper dermis (blisters)
Third degree - entire skin (appears gray-white, no pain)

Rule of 9's
estimates severity
considered critical if----
over 25% - second degree
over 10% third degree
third degree on face, hands, or feet