9238507
Description
Flashcards by Laura Miller, updated more than 1 year ago
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Created by Laura Miller
almost 7 years ago
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| Question | Answer |
| dermatology | study of the skin |
| organization of the skin | epidermis dermis hypodermis |
| # epidermis layers | 4-5 |
| type of tissue in epidermis | Keratinized, stratified squamous epithelium |
| cell types in epidermis | keratinocytes malanocytes |
| keratinocytes | contain keratin |
| keratin | tough protein that protects and waterproofs skin |
| malanocytes | produce malanin |
| melanin | pigment |
| 5 layers epidermis (stratum) | corneum lucidum granulosum spinosum basale |
| stratum corneum | top layer of epidermis 25-30 layers of dead keratinocytes |
| stratum lucidum | ONLY in thick skin areas 3-5 layers of flattened clear, dead keratinocytes |
| stratum granulosum | middle layer water repellant sealant keratinocytes start to die here |
| stratum spinosum | strength and flexibility |
| stratum basale | bottom layer epidermis cells undergo mitosis |
| disorders of epidermis | callus psoriasis moles dandruff warts |
| callus | abnormal thickening of epidermis |
| psoriasis | keratinocytes divide and move too quickly to stratum corneum |
| dermis | connective tissue |
| regions of dermis | papillary reticular |
| papillary(1/3) | superficial dermal papillae ridges(grip) meissners corpuscles - tactile free nerve endings - temp, pain, itch |
| reticular region(2/3) | deep layer subcutaneous hair follicles, nerves, oil, swet glands stretch marks(striae) |
| structures in reticular region | hair follicles nerves oil glands sweat glands |
| composition subcutaneous layer(hypodermis) | aeriolar connective tissue and adipose tissue has blood vessels pacinian coruscles(sense pressure) |
| skin color | melanin - produced by melanocytes |
| nevus | mole - benign overgrowth of melanocytes |
| skin color diagnostics | erythema - redness (injury) cyanosis - bluish (oxygen) jaundice - yellow (liver) pallor - pale (anemia, shock) |
| structures found in the skin | hair glands nails |
| hair types | lanugo vellus terminal |
| function of hair | protection |
| structure of hair | hairbulb root follicle - skin sheath shaft - hair arrector pili - muscle |
| hair color comes from | melanin |
| excessive body hair | hirsutism |
| glands of the skin | sebacious sudoriferous ceruminous |
| function sebacious glands | oil, hair follicle, dont dry out |
| function sudoriferous glands | sweat cool, waste, water |
| 2 types sudoriferous | merocrine - body temp apocrine - armpit, groin, BO |
| ceruminous glands | wax |
| structure of nails | nail body nail root eponychium |
| eponychium | cuticle |
| functions of skin | regulate temp store blood protection sensation excretion water & waste synthesis vitamin D |
| 3 forms skin cancer | basal cell carcinoma (78%) squamous cell carinoma ( 20%) malignant melanomas (2%) |
| basal cell carcinoma | basale layer |
| squamous cell carcinoma | upper epidermis |
| malignant melanomas | occurs in melanocytes |
| skin cancer risks | light skin sun family age immunosuppressed tanning beds |
| warning signs of melanoma | Asymmetry Border Color Diamater Evolving |
| cause of burns | heat electricity chemicals |
| types of burns | 1st 2nd - epidermis & dermis, blister 3rd - all layers |
| death from burns | shock, infection |
| decubitus ulcers | bed sores pressure blood deficiency |
| athletes foot | fungal |
| laceration | cut - considered skin dissorderf |
| hives | allergic |
| eczema | dermatitis rash |
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