Integumentary System
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| Integumentary System | The body covering including skin, hair, and nails
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| medical prefix's for skin are | derm- dermat-, cut-, cutan-
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| Structures of the skin | epidermis, dermis, and subcutaneous
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| Epidermis | outer layer of the skin composed of stratified squamous epithelium
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| Epidermis is composed of | 5 strata (layers); regenerates from the bottom strata and forces cells outward, packing them close together
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| The outer strata (corneum) is composed of |
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| the epidermis contains no | nerve endings or blood vessels
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| the epidermis provides a | protective waterproof covering
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| the epidermis contains | melanocytes (pigment cells) for protection from sunlight
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| The epidermis is protected by | normal flora (bacteria) which serve as a natural protection
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| the epidermis regenerates | readily
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| Dermis (true skin) | made up on dense connective tissue
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| Dermis contains collagen which is | gluelike fibers that run parallel to the skin and are the source of body lines
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| blood vessels are in excellent supply in the dermis layer they do what | they dilate to bring blood near the surface for cooling and constrict to prevent loss of heat
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| sweat glands lie deep in the dermis and send secretions through the ducts to the skin for |
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| sebaceous glands open into hair folicles and secrete sebumto keep hair and skin | lubricated and provide protection against both bacteria and drying
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| sensory receptors are located in the dermis | they are receptors for pain touch cold heat and vibration
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| arrector pili muscles (attached to teh hair contract to make | hair stand up and produce chillbumps
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| Subcutaneous (below the skin) | made up of adipose tissue
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| Sub-Q provides | insulated gives the body a rounded appearance
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| sub-q tissue is closed with what kind of suture during surgery | absorbable
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| sub-q skin is used to inject meds that would need to be | slowly absorbed
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| sub-q skin heals more | slowly and is a good medium for bacteria to grown
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| Appendages of the skin (such as hair and nails) are | extensions of the epidermis
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| hairs color is dirived from | melanocytes
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| hair is kept pliable by oil from the | sebaceous glands
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| excess hair may be __________ before surgery | shaved
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| skin acts as a mechanical barrier to __________________. | microorganisms
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| Skin acts as a ____________, to keep us in touch with out environments. | sensory organ
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| skin regulates _________by the process of ______________(sweating) and radiation(blood | evaporation, (blood to the body surface to give off heat)
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| skin protects against ______________ and ______________. | physical trauma and fluid loss
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