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8 Cards in this Set

  • Front
  • Back
Is the subcutaneous layer part of the skin?
(it is adipose tissue)
What kind of tissues make up the epidermis?
Stratified Squamous epithelium that is capable of keratinizing (becoming hard & tough)
What happens to the cells as they move up to the surface of the epidermis?
They lose water, their nuclei, & change chemically.
List the 5 layers of the Epidermis from outer to deep;
Stratum corneum (dead cells)
Stratum lucidum
Stratum granulosum
Stratum germinativum
Describe the stratum corneum;
Cells are dead; now flat membranous filled w/keratin. Glycolipids in extracellular space.
Describe the stratum lucidum;
Almost transparent, very thin 3-5 layers, not in all regions, occurs only where the skin is hairless & extra thick, palms & soles.
Describe the stratum granulosum;
Cells are flattened; organelles deterioating; cytoplasm full of lameliated granules (release lipids) & keratohyaline granules.
Describe the stratum germinativum;
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.