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Histology-Ch 9
Study of Histology & Physiology
| Question | Answer |
|---|---|
| Acid Mantle | Protective lipids & secretions on top of the skin.Part of the barrier function of the epidermis |
| Transepidermal Water Loss (TEWL) | Water loss caused bu evaporation on the skin's surface |
| UVA rays ( Ultra-violet Aging Rays) | Longer,aging rays that penetrate deeper into the skin than UVB rays |
| UVB rays (Ultra-violet Burning Rays) | Shorter,burning rays that are stronger than UVA rays |
| Subcutis Tissue | Subcutaneous tissue located beneath the dermis |
| Telangietasia | Describes capillaries that have been damaged & are now larger,or distened blood vessels.Commonly called cuperose skin |
| Stratum Granulosum | Cells that resemble granules & are filled with keratin.Production of keratin & intercellular lipids takes place here |
| Stratum Spinosum | Spiny layer of the epidermis above the basal layer |
| Stratum Lucidum | Clear layer of epidermis under the stratum corneum; found only on the palms of hands & soles of feet |
| stratum germinativum | First layer of the epidermis above the papillary layer of the dermis; aka the basal layer |
| stratum corneum | outermost layer of the epidermis;aka the horny layer |
| sebum | provides protection for the epidermis from the external factor & lubricates both the skin & hair.Aka oil |
| physiology | study of the functions or activities performed by the body's structures |
| melanin | skin pigment; a defense mechanism to protect the skin from the sun |
| Sudoriferous glands (sweat glands) | Excrete perspiration & detoxify the body by excreting excess salt & unwanted chemicals |
| pores | a tube like opening for sweat glands on the epidermis |
| Histology | Study of the structure & composition of tissue |
| Hyaluronic acid | hydrating fluids found in the skin;hydrophilic agent w/ water binding properties |
| intercellular cement | lipid substances between corneum cells that protect cells from water loss & irritation |
| Keratin | fiber protein in skin,hair & nails;provides resiliency & protection to the skin |
| eccrine glands | sweat glands found all over the body;not attached to hair follicles;do not produce an offensive odor |
| dermis | live layer of connective tissue below the epidermis |
| cell mitosis | cell division; occurs continuously in the basal cell layer |
| desmosomes | the structures that assist holding the cells together |
| collagen | fibrous,connective tissue made from protein;found in the reticular layer of the dermis;gives skin it's firmness.Topically, a large,long-chain molecular protein that lies on the top of the skin & binds water;derived from the placentas of cows or others |
| ceremides | lipid materials that are a natural part of the intercellular cement |
| apocrine glands | coiled structures attached to the hair follicles found in the underarm & genital areas |
| adipose (fat) tissue | a protective cushion that gives contour & smoothness to the body |
| fibroblasts | cells that produce amino acids & collagen |
| free radicals | Oxygen atoms or molecules w/ unpaired electrons that cause oxidation.They steal electrons from other molecules.which damages the other molecules |
| Dermal papillae | membranes of ridges & grooves that attach to the epidermis |
| arrector pili muscles | The muscle that contracts & causes "goosebumps" when we are cold |
| Integumenatry sysytems | The largest organ of the body.A strong barrier designed to protect us from the outside elements |
| Sebaceous Glands (sweat glands) | Produces oil to keep the skin soft |
| Melanocytes | Cells that produce melanin |
| Reticular Layer | The deeper layer of the dermis containing proteins that give the skin it's strength & it's elasticity |
| Lipids | protective oils,they makeup the intercellular cement between the epidermal cells |
Created by:
CLGagnon
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