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8 Cards in this Set
- Front
- Back
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Is the subcutaneous layer part of the skin?
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No
(it is adipose tissue) |
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What kind of tissues make up the epidermis?
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Stratified Squamous epithelium that is capable of keratinizing (becoming hard & tough)
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What happens to the cells as they move up to the surface of the epidermis?
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They lose water, their nuclei, & change chemically.
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List the 5 layers of the Epidermis from outer to deep;
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Stratum corneum (dead cells)
Stratum lucidum Stratum granulosum Stratum germinativum |
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Describe the stratum corneum;
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Cells are dead; now flat membranous filled w/keratin. Glycolipids in extracellular space.
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Describe the stratum lucidum;
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Almost transparent, very thin 3-5 layers, not in all regions, occurs only where the skin is hairless & extra thick, palms & soles.
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Describe the stratum granulosum;
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Cells are flattened; organelles deterioating; cytoplasm full of lameliated granules (release lipids) & keratohyaline granules.
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Describe the stratum germinativum;
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Lies closest to the dermis & recieves the most nourishment. Cells are actively mitotic stem cells; some newly formed cells become part of the more superficial layers.
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