Integumentary system part 1 Flashcards
melan
black
onych
nail
plas
formation
purpur
purple
seb
sebum
squam
scale
trich
hair
xer
dry
image figure 5.1a slide 4 integumentary on quiz and test wed the 30th tes
test cell function, histology, integumentary
Structure of the Epidermis ____, keratinized, stratified, squamous epithelial tissue
Avascular
____(make up 90% of the cell types)
Keratinocytes
Keratinocytes produce and fills up with ____
keratin
Keratinocytes produces _____
lamellar granules
______
8 % of epidermal cells
Melanocytes
Melanocytes produce _____
melanin
_____
arise in bone marrow and migrate to epidermis
Langerhans cells
_____
found in deepest layer of epidermis attached to keratinocytes by desmosomes
Merkel cells
Merkel cells connect to _______ (nerve endings) and may function in touch
Merkel (tactile) discs
_____ deepest layer of the epidermis
stratum basale
stratum spinosum
8 - 10 rows of closely packed ______
spiny, polyhedral keratinocyte cells
_____ 3 - 5 rows of flattened keratinocyte cells that develop darkly staining granules
stratum granulosum
stratum granulosum contain_______ for secretion of lipids for water-proofing between cells
lamellar granules
stratum granulosum cell begin to undergo ______ – genetically pre-programmed cell death involving lysosomes
apoptosis
stratum lucidum found only in the _____
skin of the palms of the hands and the soles of the feet
stratum lucidum 3-5 layers of ___, flat, dead keratinocytes
clear
stratum corneum 25-30 rows of flat dead keratinocytes completely filled with the tough protein____ and surrounded by lipids from lamellar granules
keratin
a ____ is an abnormal thickening of the stratum corneum due to constant friction
callus
two types of skin
thin skin, thick skin
_____ is a skin condition in which keratinization is greatly accelerated (7-10 days)
psoriasis
2 layers of the dermis
papillary region, reticular region
papillary region consists of ______ with fine elastic fibers
areolar connective tissue
____ indent the epidermis and contain capillary loops Meissner’s corpuscles or corpuscles of touch
dermal papillae
reticular region consists of _____ with bundles of collagen and course elastic fibers
dense, irregular connective tissue
____ scars are slightly raised above the original wound
hypertrophic