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Histology-Ch 9

Study of Histology & Physiology

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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