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Anatomy Chapter 5

Terms

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also called the cutaneous membrane or the integument
skin
the superficial, thinner portion of skin composed of epithelial tissue
epidermis
the deeper, thicker portion of skin composed of connective tissue
dermis
deep to the dermis, not part of the skin, composed of areolar and adipose tissue
hypodermis/ subcutaneous layer
nerve endings in the hypodermis that are sensitive to pressure
pacinian corpuscles
90% of epidermal cells
keratinocytes
8% of epidermal cells
melanocytes
attributes to skin color and protects against UV radiation
melanin
epidermal cells that arise from red bone marrow
langerhans cells
least numerous of epidermal cells, found in the deepest layer of the epidrmis
merkel cells
detect touch sensations, a flattened processof a sensory neuron
merkel cells
3-5 layers of skin,keratohyalin, lamellar granules
stratum granulosum
25-30 layers, calluses, upermost layer
stratum corneum
3-5 layer, thick skin only, fingertips and such
stratum lucidum
stem cells, lowest level
stratum basal
darkyl staining granules of protein in the statum granulosum
keratohyalin
present in the keratohyalin
lamellar granules
the mechanism that regulates the incredible growth during kerainization
epidermal growth factor
about one fifth of the dermis, areolarconnective tisue with thin collagen and elastc fibers
papillary region
small finger-like structures that project into the undersurface of the epidermis
dermal papillae
papille sometimes contain these blood vessels
capillary loops
nerve endings that are sensitive to touch, corpuscles of touch
Meissner corpuscles
dendrites that lack any apparent structural specialization
free nerve endings
part of the dermis attached to the subcutaneous layer, consisting of dense irregular connective tissue containing fibroblasts, collagen, and elastic fiber
recticular region
ability to stretch
extensibility
ability to go back to original shape
elasticity
stretch marks due to tears in the dermis
straie
increase the surface area of the epidermis and increase grip
epidermal ridges
the study of th pattern of epidermal ridges
dermatoglyphics
round flat or raised are that represents a benign localized overgrowth of melanocytes
nevus mole
synthesis of melanin from the amino acid tyrosine in the presence of the amino acid tyronase occurs here
melanosome
oxygen carrying pigment inred blood cellls
hemoglobin
yellow-orange pigment tat gives egg yolkand carrots color
carotene
inherited inbility to produce melanin
albinism
partial or complete loss of melanocytes
vitiligo
homeostatic regulation of body temp
thermoregulation
sensations that arise in the skin
cutaneous sensations
eliminatin of substances from the body
excretion
the passage of materils from the external environment into body cells
absorption

Deck Info

39

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