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Mod 2 Ch. 22
Ch. 22 Integumentary System
Term | Definition |
---|---|
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 |