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32 Cards in this Set
- Front
- Back
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What are the 4 cell types in the epidermis?
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keratinocytes
melanocytes langerhan's cells Merkel cells |
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Where are keratinocytes?
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deep mitotic layer
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Where are melanocytes located?
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basal layer of epidermis
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Role of melanocytes?
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manufacture melanin
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How is melanin transferred?
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along cytoplasm projections to neighboring keratinocyte
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Role of Langerhan's cells?
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act as an immune system for epidermis
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What are Merkel cells?
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sensory receptor cells
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Mitosis deep to superficial?
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deep: mitotic
superficial: non mitotic |
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Keratin deep to superficial?
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deep: keratin synthesis
superifical: keratin modified |
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Blood supply: deep to superficial?
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deep: access to blood supply
superficial: no access |
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Stratum Germinativum- location?
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deepest part in epidermis
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Stratum Spinosum- size? what is it? location?
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-very thick
-spiny projections -on top of stratum germinativum |
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Stratum granulosum- role?
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contains granules for water proofing the layer
-prevents water from getting in |
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What layers of epidermis are non living?
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stratum lucidum
stratum corneum |
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Where is stratum lucidum located?
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only in palms and soles
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Where is stratum corneum located?
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top layer
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What bounds the dermis together? 3
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collagen, elastin, reticular fibers
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What are the 2 layers of the dermis?
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papillary layer
reticular layer |
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Papillary layer- location? what does it contain?
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top layer of dermis
contains blood vessels, papillae, dermal ridges |
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Reticular layer- location? what it contains?
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deep and thickest portion of dermis
-contains collagen bundles, eleastin, striae |
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What does hair contain?
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layer of dead cells
contains keratinocytes |
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What are the 3 layers of the hair shaft?
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medulla
cortex cuticle |
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Root hair plexus?
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nerve
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Papillae of hair?
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blood supply
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What are nails?
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modification of existing epidermis
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What does nails contain?
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hard keratin
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Role of Eccrine sweat glands?
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blood filtrate
temperature regulation |
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Where are Apocrine sweat glands located? 2
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axillary and anogenital regions
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Where does the Apocrine sweat glands empty?
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hair follicles
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Role of Cerumionous gland?
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wax producing
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Where are Sebaceous glands located?
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everywhere but palms and soles
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Role of Sebaceous gland ? 2
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secrete sebum
hormonal stimulation |
