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Integumentary System

Classes of Body Membranes Epithelial. Cutaneous-SkinKeratinizing, stratified, squamous epithelium superficial to fibrous connective tissueDry. . Mucous-Epithelial tissue on top of a loose connective tissue baseLines all body cavities open to the outsideWet. . SerousSimple squamous epitheliu

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Integumentary System

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    1. Integumentary System

    2. Classes of Body Membranes Epithelial Cutaneous-Skin Keratinizing, stratified, squamous epithelium superficial to fibrous connective tissue Dry

    3. Mucous- Epithelial tissue on top of a loose connective tissue base Lines all body cavities open to the outside Wet

    4. Serous Simple squamous epithelium attached to areolar connective tissue Lines body cavities closed to the outside Parietal vs. Visceral layers Serous fluid between layers

    5. Connective Tissue Membranes Synovial Composed only of connective tissue Lines the fibrous capsules surrounding joints where they provide smooth surface and secrete lubricating fluid Also lines small sacs of connective tissue called bursae and the tube-like sheaths of tendons Cushions organs moving against eachother during muscle activity (i.e. tendon across a bone’s surface)

    6. Skin Functions Barrier to keep insides in and outsides out Protection from bacterial invasion, chemical exposure, UV, mechanical damage Thermal homeostasis Production of Vit. D Houses sensory receptors

    7. SKIN Epidermis: Outermost layer of skin Made up of stratified squamous epithelium Keratinization…outermost cells are dead

    8. Dermis: Deep to the epidermis Made up of dense connective tissue Dermis and epidermis are firmly connected, though a burn or friction may cause them to separate, forming a blister

    9. Subcutaneous Tissue-Hypodermis Deep to the dermis Made of adipose tissue (fat) Anchors skin to underlying tissues Insulator and shock absorber

    10. Burns Life Threatening Concerns: Dehydration (loss of fluid from damaged areas) Dehydration can lead to the shut down of kidneys and circulation shock (low blood volume) Infection Burned area is only sterile for about 24 hrs. After that bacteria can invade.

    11. Burns By Degree 1st Degree Only epidermis is damaged Red and swollen like a sunburn 2nd Degree Epidermis and upper region of dermis Red and painful w/blisters and/or seepage 3rd Degree Entire thickness of skin damaged Grey-white or blackened Classified as critical if: Over 25% of body with 2nd degree burns Over 10% of body with 3rd degree burns 3rd degree burns of face, hand and feet

    12. Burn Pictures ..\..\A&P from Ethan\Chapter 4\Burn Pics.doc

    13. Rule of Nines: Estimation of Fluid Loss Due to Burns Anterior Surfaces Trunk 18% Legs 9% each Arms 4.5% each Perineum 1% Posterior Surfaces Trunk 18% Legs 9% each Arms 4.5% each Head and Neck 4.5%

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