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Stratum Spinosum• Stem cell daughter cells (some can still divide)• Melanocytes & Langerhans cells• Establishment of Desmosomes
Stratum granulosum
Stratum Granulosum• Cells displaced from stratum spinosum Keratinocytes• Production of keratohyalin and keratin fibers• Cells start to die. Dehydration leaves interlocked layers of
keratin & keratohyalin
Stratum lucidum
Stratum Lucidum• In palms of hands and soles of feet • Cells do not stain well clear (lucid) looking
• Many layers of flattened, dead cells, filled with keratin• Continually shed in sheaths• Water-resistant but not water proof
Sweat Glands Eccrine Sweat Glands [7] Simple, coiled tubular glands are much more common than
Apocrine. Regulate body temperature through evaporation of perspiration Also plays a role in elimination – perspiration is diluted urine.
Drug detection as easy as taking a swipe of someone's sweat could someday be in the hands of law enforcement, thanks to research conducted at the Arkansas Biosciences Institute at Arkansas State University.