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Integumentary System

Integumentary System

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Integumentary System

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  1. Chapter 5 Integumentary System

  2. Combining Forms for the Integumentary System adip/o lip/o steat/o dermo/o dermat/o cutane/o

  3. Combining Forms for the Integumentary System adip/o fat adiposislip/o lipomasteat/o steatoma dermo/o skin hypodermicdermat/o dermatologycutane/o subcutaneous

  4. Combining Forms forthe Integumentary System eyrthr/o hidr/o hist/o histio/o

  5. Combining Forms forthe Integumentary System erythr/o red erythrodermatitis hidr/o sweat anhidrosis hist/o tissue histologyhistio/o histiogenic

  6. Combining Forms forthe Integumentary System ichthy/o kerat/o scler/o leuk/o

  7. Combining Forms forthe Integumentary System ichthy/o fish ichthyoid kerat/o hard keratosisscler/o scleroderma leuk/o white leukonychia

  8. Combining Forms forthe Integumentary System melan/o myc/o onych/o plas/o

  9. Combining Forms forthe Integumentary System melan/o black melanocyte myc/o fungus mycosis onych/o nail onychodystrophy plas/o formation dysplastic

  10. Combining Forms forthe Integumentary System purpur/o seb/o squam/o

  11. Combining Forms forthe Integumentary System purpur/o purple purpuric seb/o sebum (oil) seborrhea squam/o scale squamous

  12. Combining Forms forthe Integumentary System trich/o xer/o xanth/o

  13. Combining Forms forthe Integumentary System trich/o hair trichorrhexis xer/o dry xerosis xanth/o yellow xanthoma

  14. Integumentary System Overview • Composed of skin (integument), and its appendages (hair, nails, sweat glands and sebaceous glands) • Protects body for injury or intrusion of microorganisms • Helps regulate body temperature • Houses receptors for sense of touch

  15. Skin • Largest organ in the body • Divided into an outer layer and an inner layer: • epidermis — outer layer • dermis (corium) — inner layer

  16. The Skin (continued)

  17. Epidermis • Consists of several layers of stratified squamous (scale like) epithelium: • basal layer — innermost layer • basal cells are constantly being pushed up, moving older cells to the surface • melanocytes — produce pigment (melanin) which gives color to the skin • squamous layer — outermost layer

  18. Dermis (Corium) • Connective tissue layer • Contains: • blood and lymphatic vessels • nerve and nerve endings • glands • hair follicles • network of elastic and collagen fibers (gives skin elasticity and toughness)

  19. Subcutaneous Layer • Layer below the dermis • Composed of loose connective tissue and adipose (fatty) tissue

  20. Lesions • Areas of pathologically altered tissue • Two types: • primary • secondary

  21. Primary Lesions: pg 111-112 • Lesions arising from previously normal skin • Flat, nonpalpable changes in skin color: macule, patch • Elevated, palpable, solid mass: papule, wheal • Elevation formed by fluid within a cavity: vesicle, bulla, pustule

  22. Secondary Lesions: pg112-114 • Lesions that result in changes in primary lesions • Types: • Loss of skin surface: erosion, ulcer, excoriation, fissure • Material on skin surface: scale, crust • Other secondary lesions: keloid, nevus, verruca

  23. Secondary Lesions cont’d… • Lesions of a blood vessel (also a secondary lesion) • cherry angioma — round, bright red blood vessel tumor often seen on trunk • telangiectasia (spider angioma) — radiate from central arteriole most often found on face, neck or chest Vascular Lesions

  24. Secondary Lesions cont’d… • Lesions as a result of hemorrhages in the skin • petechia — minute hemorrhagic spot — indicates a bleeding tendency • ecchymosis — bruise Purpuric Lesions

  25. Secondary Lesions cont’d… • Skin tumors arising from the epidermis • dysplastic nevus — mole with precancerous changes • verruca — wart; caused by a virus Epidermal Tumors