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Mod 2 Ch. 22

Ch. 22 Integumentary System

5 Functions of Integumentary System 1. Protection 2. Regulation 3. Sensation 4. Absorption 5. Secretion
3 layers of skin 1. Epidermis 2. Dermis 3. Subcutaneous Layer
Epidermis -4 layers -contains melanin which gives skin its color
melanin gives skin its color
4 layers of Epidermis 1. stratum corneum 2. stratum lucidum 3. stratum granulosum 4. stratum germinativum
Dermis -"true skin" -contains dermal papillae aka fingerprints -2 layers
2 layers of Dermis 1. Papillary 2. Reticular
shaft visible portion of the hair
papillae found at the base of the hair follicle
nail consists of body, root and matrix (nail bed)
lunula crescent-shaped white area at base of nail
matrix of nail nail bed
sebaceous glands -located in the dermis -secrete sebum
sudoriferous glands secrete perspiration
skin cancer most common of all cancers
malignant cancerous tumor
basal cell carcinoma most common form of skin cancer
location of skin cancer -nose is most common -also occurs on head, neck, back, chest and shoulders
squamous cell carcinoma malignant tumor that affects the middle layer of the skin
malignant melanoma -originates in the melanin-producing melanocytes -often occurs in the melanocytes of a pre-existing mole
ABCDE Rule Diagnostic tool for malignant melanomas
acne vulgaris -most often affects teens -severity of the acne determines the most useful and beneficial treatment
alopecia -baldness or loss of hair -most common is male-pattern baldness
cellulitis acute, spreading bacterial infection below surface of the skin
contact dermatitis -allergic reaction -poison oak for example
decubitus ulcer -pressure sore or bedsore -common location is coccyx -4 stages I-4 (most severe)
eczema atopic dermatitis
Herpes Zoster -aka shingles -viral infection that causes a painful rash that is also responsible for chicken pox -painful, fluid-filled blisters -treated with oral anti-viral meds
hirsutism thick abnormal hair growth
Created by: vanstellee