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18 Cards in this Set
- Front
- Back
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Sebaceous Glands
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oil glands found all over skin except palms of hands & soles of feet; lubricant to keep skin soft & moist
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Apocrine Glands
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found in the axillary & genital areas; secrete milky protein and fat rich substances
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Eccrine Glands
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found all over body especially on palms of hands, soles of feet, & forehead; important role of maintaining body temperature
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Two Sweat Glands
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Eccrine & Apocrine
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Reticular Layer
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deepest skin layer of the dermis; contains pacinian corpuscles
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Pacinian Corpuscles
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pressure receptors located in the reticular layer
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Papillary Layer
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superficial dermal region composed of areolar connective tissue; the pain (free nerve endings) & Meissner's Corpuscles are found here
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Meissner's Corpuscles
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touch receptors found in the papillary layer of the dermis
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Stratum Basale (Basal Layer)
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deepest epidermal layer attached to the dermis; single row of youngest keratinocytes; single row of stem cells that undergo rapid division (stratum germinativum)
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Stratum Spinosum (Prickly Layer)
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superficial to basal layer; weblike system bundles of intermediate filaments made of pre-keratin protein; Melanin Granules & Langerhans' cells abundant
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Stratum Granulosum (Granular Layer)
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thin; 3-5 cell layers where changes in keratinocyte appearance occurs with keratinization; cells begin to die
2 types: Lamellated Granules- waterproofing glycolipid to make cells more resistant to destruction. Keratohyaline Granules- accumulate forming keratin |
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Stratum Lucidum (Clear Layer)
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thin, transparent band superficial to Stratum Granulosum; 2-3 rows of dead keratinocytes
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Stratum Corneum (Cornified/Horny Layer)
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outermost layer of epidermis and accounts for the bulk of the epidermal thickness; dead keratinocytes; protect against abrasion & penetration, glycolipid waterproofs layer
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Keratinocytes
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most abundant epidermal cell; produce keratin (fibrous protein gives epidermis durability & protective capabilities)
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Melanocytes
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spidery black cells that produce melanin; protects deeper epidermis from UV light
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Langerhans (Dendritic) Cells
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epidermal cells; immunity
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Merkel (Tactile) Cells
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in conjunction with sensory nerve endings form touch receptors located at epidermal-dermal junction
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Epidermis, Dermis, Hypodermis
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outermost layer composed of epithelium
underlying 2nd major skin region; strong, flexible connective tissue subcutaneous tissue; not part of skin; adipose tissue |
