Term
| Integumentary System is defined as the.. |
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Definition
| Skin and all associated structures (hair, nails, and glands) |
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Term
| Five functions of integument |
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Definition
| Body temperature regulation, protection, stimuli perception, excretion of waste materials and synthesis of Vitamin D3. |
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Term
| Epidermis (epithelial layer) |
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Definition
| Keratinized stratified squamous epithelium. Avascular. |
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Term
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Definition
| Most predominant cell in skin; produce keratin. Also produce antibodies. |
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Term
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Definition
| Deepest layer of epidermis firmly attached to dermis (aka stratum germinativum). |
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Term
| Stratum spinosum (layer 2) |
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Definition
| Spiny layer; several layers; thickest layer in thin skin. Name from many spiny keratinocyets scatters throughout. |
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Term
| Stratum granulosum (layer 3) |
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Definition
| Consists of 1-5 layers keratinocytes; receives nutrients from capillaries in dermal layer; layers above here dead. |
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Term
| Stratum lucidum (layer 4) |
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Definition
| Found in thick skin only! Clear layer; Not in thin skin; Few layers of flat dead keratinocytes; i.e. palms/soles |
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Term
| Stratum corneum (layer 5) |
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Definition
| Horny layer; most superficial epidermis; many cell layers thick; Dead keratinized cells that are filled with keratin - no nuclei/organelles. |
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Term
| Dermis (fibrous connective tissue) |
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Definition
| Second layer of skin; binds body together; 2 layers - papillary and reticular; dense irregular CT. |
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Term
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Definition
| Most superficial of dermis; Areolar CT with collagen/elastic fibers; Form ridges make fingerprints, etc. |
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Term
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Definition
| 80% of dermis; consists of dense irregular CT; named for network (reticulum) of collagen fibers |
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Term
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Definition
| Sensitive to temperature, pain (nociceptors) and pressure |
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Term
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Definition
| Sensitive to light pressure, discriminative touch, low vibrations |
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Term
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Definition
| Sensitive to deep pressure, high frequency vibration. Adapt rapidly. |
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Term
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Definition
| Fatty layer; not actual layer of skin; AKA subcutaneous layer or superficial fascia. Deep to dermis. |
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Term
| Three pigments contribute to skin color. |
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Definition
| Melanin, Carotene, Hemoglobin. |
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Term
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Definition
| Sebaceous, sweat (sudoriferous), and ceruminous glands |
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Term
| Hair and nails composed of... |
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Definition
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Term
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Definition
| Produce oily secretion called sebum (keeps skin moist/flexible). Secretion is holocrine. |
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Term
| Sudoriferous "sweat" glands |
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Definition
| 2 kinds - Merocrine(most numerous, watery perspiration for cooling); Apocrine(thicker sweat scent glands) |
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Term
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Definition
| Found in external auditory canal; Cerumen; waxy; Repels insects and kills bacteria; modified sweat glands "apocrine" |
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Term
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Definition
| Specialized sweat glands located in anterior thorax; produce milk in females; present in both sexes |
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Term
| Hair (pilus) characteristics. |
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Definition
| Dead keratinized cells; Bulb, root and shaft grows in follicle; 3 layers - medulla, cortex, cuticle. |
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Term
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Definition
| Lanugo (fine down hair;fetus), vellus(fine unpigmented hair), terminal(long coarse pigmented). |
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Term
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Definition
| Modification of stratum corneum; very thin dead scaly cells closely packed and filled with parallel keratin fibs |
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Term
| 4 stages of injury healing |
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Definition
| 1.Bleeding 2.Clot/scab at epidermis surface 3. Granulation occurs/clot dissolves 4. Scar tissue forms |
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Term
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Definition
| Skin gets thinner, drier; Injuries/infections increase; Dermis sags/wrinkles; Less resilient. |
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Term
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Definition
| 1st degree(superficial layer); 2nd degree(deeper,enter reticular layer); 3rd degree(kill all epidermal/dermal layers, can be life threatening). |
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Term
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Definition
| Under sympathetic control, raises hair |
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