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INTEGUMENTARY SYSTEM

INTEGUMENTARY SYSTEM. FUNCTION. PROTECTION SEPARATES THE BODY FROM THE EXTERNAL ENVIRONMENT. LAYERS. EPIDERMIS DERMIS. LAYERS OF THE EPIDERMIS. STRATUM CORNEUM OUTERMOST LAYER CONSISTS OF MANY LAYERS OF DEAD CELLS CONTAINS KERATIN – WATERPROOF AND PREVENTS EVAPORATION OF BODY’S WATER

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INTEGUMENTARY SYSTEM

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  1. INTEGUMENTARY SYSTEM

  2. FUNCTION • PROTECTION • SEPARATES THE BODY FROM THE EXTERNAL ENVIRONMENT

  3. LAYERS • EPIDERMIS • DERMIS

  4. LAYERS OF THE EPIDERMIS • STRATUM CORNEUM • OUTERMOST LAYER • CONSISTS OF MANY LAYERS OF DEAD CELLS • CONTAINS KERATIN – WATERPROOF AND PREVENTS EVAPORATION OF BODY’S WATER • BARRIER TO PATHOGENS

  5. LAYERS OF THE EPIDERMIS • STRATUM GERMINATIVUM • INNER LAYER • WHERE MITOSIS TAKES PLACE • CONTAINS THE CELLS THAT PRODUCE KERATIN • CONTAIN MELANOCYTES • MELANIN AND VIT D PRODUCTION IS INCREASED BY EXPOSURE TO UV RAYS

  6. DID YOU KNOW… • EVERY MINUTE 30,000-40,000 DEAD SKIN CELLS FALL OFF OR ARE SLOUGHED OFF YOUR BODY!!!!!!!! WOW!!!!!!! • AN ALL NEW YOU EVERY MONTH!

  7. WITHIN THE EPIDERMIS • LANGERHANS CELLS – PHAGOCYTIZE FOREIGN MATERIAL

  8. DID YOU KNOW… • AN ADULT WILL HAVE MORE THAN 20 SQUARE FEET OF SKIN • YOU WILL SHED APPROXIMATELY 40 POUNDS OF SKIN DURING YOUR LIFETIME!!!!!

  9. BETWEEN THE EPIDERMIS AND DERMIS • PAPILLARY LAYER – ABUNDANT IN CAPILLARIES • BLISTER – SEPARATION OF THE EPIDERMIS FROM THE DERMIS • CALLUS – PRESSURE TO AN AREA THAT INCREASES MITOSIS

  10. DERMIS • FIBROBLASTS PRODUCE COLLAGEN (STRENGTH) AND ELASTIN (ELASTIC) • HAIR FOLLICLES – HAIR ROOT • NAIL FOLLICLES – NAIL ROOT • RECEPTORS – PAIN (FREE NERVE ENDINGS), OTHER RECEPTORS (ENCAPSULATED) • GLANDS • BLOOD VESSELS

  11. GLANDS • SEBACEOUS – SEBUM – PREVENTS DRYING OF THE SKIN AND GROWTH OF BACTERIA • CERUMINOUS – CERUMEN – KEEPS EARDRUM PLIABLE • SWEAT GLANDS – APOCRINE (AXILLARY AND GROIN) AND ECCRINE (ALL OVER BODY) FOR MAINTAINING NORMAL BODY TEMPERATURES

  12. BLOOD VESSELS • IN A WARM ENVIRONMENT, VESSELS DILATE TO BRING EXCESS HEAT TO THE BODY SURFACE • IN A COLD ENVIRONMENT, VESSELS CONSTRICT TO CONSERVE HEAT

  13. SUBCUTANEOUS TISSUE • AKA SUPERFICIAL FASCIA • FUNCTION IS TO CONNECT THE DERMIS TO THE UNDERLYING MUSCLE • MADE OF AREOLAR CONNECTIVE TISSUE (STRENGTH AND PROTECTION) AND ADIPOSE TISSUE (STORES FATS AND NUTRIENTS)

  14. BURNS • FIRST-DEGREE – ONLY SUPERFICIAL EPIDERMIS IS BURNED, PAINFUL • SECOND-DEGREE – DEEPER LAYERS OF THE EPIDERMIS ARE AFFECTED, BLISTERED, PAINFUL • THIRD-DEGREE – EPIDERMIS IS GONE, MAY EXTEND TO DERMIS AND SUBCUTANEOUS TISSUE, NOT PAINFUL SINCE PAIN RECEPTOR SITES ARE BURNED

  15. RULE OF 9’S

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