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28 Cards in this Set
- Front
- Back
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What are the three major regions the skin consists of? |
1 epidermis 2 dermis 3 hypodermis |
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how much does skin usually weigh? |
9-11 pounds |
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What are the four or five layers of the epidermis? |
basale, spinosum, granulosum, lucidum(only in thick skin) , corneum |
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What produces the fibrous protein keratin? |
keratinocytes |
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what produces the pigment melanin? |
Melanocytes |
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What cells have macrophages which are key activators of the immune system? |
dendric cells |
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What cells have sensory touch receptors? |
tactile cellws |
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Which is the deepest epidermal layer |
stratum basale |
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which layer is a single row of stem cells? |
stratum basale |
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which layer of the epidermis is prickly |
spinosum |
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thin layer of the epidermis about four to six cell layers thick. Cells above this layer start to die |
granulosum |
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clear layer of the epidermis only present in thick skin on the palms and bottom of feet |
lucidum |
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horny layer of the epidermis. 20 -30 row of dead flat keratinized mebranous saces |
corneum |
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how many cells do we shed every minute |
around 50,000 |
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what three pigments contribute to skin color |
1 melanin 2 carotene 3 hemoglobin |
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what are the two different forms of melanin |
1 reddish yellow 2 brownish black |
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what stimulates melanin producction |
sun exposure |
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what is carotene |
yellow to orange pigment most obvious in the palms and soles |
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what is hemoglobin |
pinkish hue in fair skin |
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what layer of the skin has strong flexible connective tissue |
dermis |
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what are the two layers of the dermis |
1 papillary 2 reticular |
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the papillary layer of the dermis contains what three things |
1 capillary loops 2 meissners corpuscles 3 free nerve endings |
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what causes fingerprints |
epidermal ridges lie atop deeper dermal papillary ridges to form frictions ridges which causes fingerprints |
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what lines are important to sugeons when operating on someone |
cleavage lines |
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what are flexture lines |
dermal folds at or near joints |
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what are striae |
slivery white scars/ stretch marks |
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what is a blister |
fluid filled pocket that serarates epidermal and dermal layers |
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subcutaneous layer deep to the skin which is composed of adipose and areolar connective tissue |
hypodermis |
