Tissues/Integumentary System Flashcards
Integumentary system
consist; SKIN, HAIR, NAILS, sev. GLANDS
Epidermis
OUTERMOST Superficial layer (Stratified squamous = PROTECTION)
Stratum basale
single layer attached to Basement membrane; DEEPEST layer
Melanocytes
cell; produce Melanin
Melanin
skin Pigment from Melanocytes
Stratum spinosum
layer; cells ABOVE the Strata basale
Stratum granulosum
layer; Keratohyalin granules accumulate in cells
Keratohyalin
Granule (Secretory vesicle) precursor of Keratin (locate; OUTERMOST Epidermis)
Stratum lucidum
transparent band of flat DEAD Keratinocytes (locate; Thick Skin)
Stratum corneum
tough OUTERMOST layer of KERATINIZED cells
Keratinocytes
cells; produce Keratin
Keratin
protein; PROTECTIVE
Dermis
structural integrity of Skin
Papillary Layer
Areolar C.T. w/Collagen & Elastic fibers
Papillae
bumps; interlock w/Epidermis & provide Adhesion between 2 layers
Reticular Layer
COLLAGEN fibers = STRENGTH & RESISLENCY to SKIN + ELASTIC fibers = STRETCH
Tactile (Meissner) corpuscles
Light touch receptor; in UPPER Dermis
Tactile (Merkel) discs
Light touch receptor; in UPPER Dermis & LOWER Dermis
Lamellar (Pacinian) corpuscles
receptor; sense PRESSURE (Vibration, Skin)