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30 Cards in this Set
- Front
- Back
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Functions of Integumentary System
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protection injury radiation losing H20 regulates temp vit D
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Thin Skin
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everywhere 4 layers can have hair sebaceous glands sudoriferous
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Thick Skin
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palms & soles 5 layers no hair no sebaceous glands sudoriferous
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Epidermis
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on top stratified squamous ET
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Dermis
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primarly dense regular connective tissue
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Hypodermis
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below underneth skin areolar CT & adipose CT
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4 cell types
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mostly keratinocytes- tough protein melanocytes-melanin tactile dendritic cells
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Stratum basale
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bottom most layer closest to dermis 1 layer keratinocytes melano & te makes new cells
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Stratum spinosium
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several layers spiny thick cells alive
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Stratum granulosum
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granular few layers cells die no blood flow fill w keratin
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Stratum lucidum
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clear layer few layers thick thick skin
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Stratum corneum
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horny layer many layers thick keratin & dead protective layer
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Dermis top: papillary layer
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areolar CT
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Dermis bottom: reticular layer
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thicker dense irregular
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contains
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blood vessels nerve endings various accessories
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Skin Color controlled by 3 pigments
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Melanin-most important Carotene-found in fruits & vegs Hemoglobin-red bld cells carry oxygen
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Hair
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grows out of follicules epidermal tissue embedded in dermis
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Vellus hair
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all over body thin fine short invisible
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Terminail hair
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coarser darker scalp axillary pubic facial hair
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Hair growth
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grows for a while, stops, new hair starts to grow & old hair falls out
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Baldness
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hair follicule stop making terminal hair start making vellus hair
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Sebaceous Glands
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found next to hair follicules make sebum oily lubricate skin & hair
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Sudoriferous Glands
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make sweat filtrate of blood mostly H20, salt little urea
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Eccrine Glands
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make normal sweat found everywhere
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Apocrine Glands
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sweat also protein & fats found axillary, pubic bacteria eat stinky smell
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Nails
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made by keratin
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Basal Cell Carcinoma
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least malignant most common
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Squamous Cell Carcinoma
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looks scapy
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Melanoma
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cancer of melanocytes deadly cancerous cells spread quickly
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ABCD
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A asymmetry B border irregularity C color dark weird D diameter larger than pencil eraser
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