Term
| integumentary system made up of |
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Definition
| skin, glands, hair, nails |
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Term
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Definition
-protection
-body temp regulation
-collect sensory info |
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Term
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Definition
-epidermis
-dermis (majority)
-hypodermis |
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Term
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Definition
-not technically part of skin
-mostly adipose tissue |
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Term
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Definition
-stratified squamous with keratin
-AVASCULAR
-keratinocytes
-melanocytes
-epidermal dendritic (Langerhans) cells
-tactile (Merkel) cells |
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Term
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Definition
| produce fibrous keratin protein |
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Term
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Definition
-10-25% of cells in lower epidermis
-produce pigment melanin |
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Term
| epidermal dendritic (Langerhans) cells |
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Definition
| macrophages that help activate immune system |
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Term
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Definition
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Term
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Definition
-stratum corneum
-stratum lucidum
-stratum granulosum
-stratum spinosum
-stratum basale |
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Term
| stratum basale (germinativum) |
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Definition
-single row of stem cells
-25-45 days to reach top |
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Term
| stratum spinosum (prickly layer) |
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Definition
-layers of keratinocytes (prickly) attached to desmosomes
-abundant melanin and dendritic cells |
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Term
| stratum granulosum (granular layer) |
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Definition
-3-5 layers of keratinocytes
-cells flatten and begin to disintegrate
-last layer to receive nutrients |
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Term
|
Definition
-in thick skin
-flat dead keratinocytes |
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Term
| stratum corneum (horny layers) |
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Definition
-20-30 rows of dead keratinocytes
-majority
-protects, waterproofs |
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Term
|
Definition
-lipid soluble
-chem disruption
-mechanical disruption (radiation) |
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Term
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Definition
-strong, flexible CT
-papillary
-reticular |
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Term
| papillary layer of dermis |
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Definition
-smaller
-areolar CT
-vascular
-capillary loops
-Meissner's corpuscles (touch)
-free nerve endings |
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Term
| reticular layer of dermis |
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Definition
-80% of dermis
-all 3 fibers
-more fibrous |
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Term
|
Definition
-protective layer
-primary anchor
-stores fat |
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Term
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Definition
-damages DNA
-bundles elastin
-suppresses immune system
-breaks down folic acid (DNA repair, RBC production) |
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Term
| sweat glands and sebaceous glands are |
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Definition
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Term
| hair, hair follicles, nails are |
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Definition
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