Chapter 5: The Integumentary System
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| Integumentary System | show 🗑
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| show | cutaneous (skin) & accessory structures
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| show | largest organ system; 16% body weight
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| Parts of cutaneous membrane | show 🗑
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| show | superficial epithelium (epithelial tissues)
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| inner dermis | show 🗑
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| Accessory structures to integument | show 🗑
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| show | Circulatory system and nervous system
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| show | blood vessels
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| nervous system | show 🗑
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| Subcutaneous layer | show 🗑
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| Functions of skin | show 🗑
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| Epidermis | show 🗑
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| show | most abundant cells in the epidermis
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| Thick Skin | show 🗑
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| Think Skin | show 🗑
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| Layers of Epidermis | show 🗑
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| Basal lamina | show 🗑
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| show | many stem cells (basal cells), attached to basal lamina by hemodemosomes, forms bond between epidermis and dermis
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| Structures of stratum germinativum | show 🗑
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| show | cells of stratum germinativum, found in hairless skin, respond to touch
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| show | cells of stratum germinativum, contain melanin
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| show | spiny layer, 8-10 layers of keratinocytes bound by desmosomes, are spiny because the cells shrink until cytoskeletons stick out
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| Cells of stratum spinosum | show 🗑
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| Characteristics of Stratum Granulosum | show 🗑
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| Keratin | show 🗑
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| Keratohyalin | show 🗑
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| Cells of stratum granulosum | show 🗑
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| Stratum Lucidum | show 🗑
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| cells of stratum lucidum | show 🗑
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| stratum corneum | show 🗑
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| show | formation of a lyer of dead, protective cells filled with keratin; occurs everywhere but eyes
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| show | 15-30 days to move from stratum germinosum to stratum corneum
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| show | interstitial fluid lost by evaporation through the stratum corneum
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| Sensible perspiration | show 🗑
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| Causes of dehydration | show 🗑
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| Causes of hydration | show 🗑
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| Skin color depends on | show 🗑
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| Melanin | show 🗑
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| Carotene | show 🗑
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| show | protects skin from sun damage, produces skin color (depends on melanin production NOT number of melanocytes)
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| UV radiation | show 🗑
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| show | blood vessels dilate from heat, skin reddens/ blood flow decreases, skin pales
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| show | bluish skin tint caused by severe reduction in blood flow or oxygenation
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| show | buildup of bile produced by liver; yellow color
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| show | disease of the pituitary gland; skin darkening
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| show | loss of melanocyte, loss of color (black to white)
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| Nevus | show 🗑
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| show | capillary malformation (buildup)-birthmarks
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| show | birthmark located on forehead and eyelids, usually disappear by age 2
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| show | birthmark on the back of the neck and can last into adulthood
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| infantile hemangioma | show 🗑
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| port-wine stain | show 🗑
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| show | also called cholecalciferol and produced by epidermal cells in the presence of UV radiation, converted to calitriol by liver and kidneys to aid absorption of calcium and phosphorus. Insufficient vitamin D causes rickets
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| EGF (Epidermal Growth Factor) | show 🗑
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| show | promote division of germinative cells, accelerate keratin production, stimulate epidermal repair, and stimulate glandular secretion
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| show | Anchors epidermal accessory structures (hair follicles, sweat glands), and has 2 components: outer papillary layer and deep reticular layer
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| The Reticular Layer | show 🗑
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| Papillary Layer | show 🗑
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| Dermatitis | show 🗑
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| show | characterized by sagging and wrinkles caused by dehydration, age, hormonal changes, or UV exposure.
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| show | thickened tissue resulting from thickened tissue resulting from excessive stretching of skin from pregnancy or weight gain
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| Lines of Cleavage | show 🗑
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| show | a parallel cut remains shut, heals well; a cut across pulls open and scars
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| Arteries n Dermis | show 🗑
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| Veins in Dermis | show 🗑
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| show | lies below integument; stabilizes skin; allows separate movement; made of elastic areolar and adipose tissue; connected to reticular layer by connective tissue fibers; has few capillaries and no organs
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| Adipose tissue (fat) | show 🗑
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| Hair | show 🗑
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| show | involuntary smooth muscle
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| show | hair papilla contains capillaries and nerves; hair bulb produces hair matrix
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| Hair Matrix | show 🗑
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| show | medulla: central core; cortex: middle layer; cuticle: surface layer
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| Keratin | show 🗑
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| show | inner layer of hair follicle; contacts cuticle in lower hair root
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| show | extends from skin surface to hair matrix
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| show | dense connective-tissue sheath that contacts connective tissues of dermis
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| show | non growing hair attached to inactive follicle
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| show | fetal hair follicles
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| vellus hairs | show 🗑
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| terminal hairs | show 🗑
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| show | Sebaceous and sweat glands
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| Sebaceous Glands (oil glands) | show 🗑
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| Sebaceous follicles | show 🗑
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| Sweat glands | show 🗑
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| Aprocrine glands | show 🗑
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| show | widely distributed especially on palms and soles, cools skin, flushes microorganism and chemicals
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| show | protect eardrum and produces earwax
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| show | Made of dead cells, produced in a deep epidermal fold near the bone called the nail root
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| Classification of burns | show 🗑
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Created by:
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