Wound Certification Specialists Exam
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Skin Structure - ✔✔
External skin surface - ✔✔Stratum basale the granular layer, Stratum
spinosum the spiny layer, Stratum granulosum the granular layer, Stratum
lucidum the clear layer, Stratum corneum the horny layer
Stratum basale - ✔✔The Deepest cell layer; contains continuous dividing
cells.
Stratum spinosum - ✔✔The Epithelial cell layer located between the
stratum basale and stratum granulosum.
Stratum granulosum - ✔✔Epithelial cell layer located between the
stratum spinosum and stratum lucidum.
Stratum lucidum - ✔✔Epithelial cell layer located between the stratum
granulosum sand stratum corneum.
Stratum corneum - ✔✔Outermost epithelial cell layer; consists of dead
keratinocytes
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Basement Membrane - ✔✔Forms junction between dermis and
epidermis.
Cells of the Epidermis: - ✔✔Keratinocytes create toughness,
Langerhans' cells offer protection, Melanocytes produce melanin, Merkel's
cells offer touch sensation
Functions Of Skin - ✔✔Prevents excessive loss of fluids; melanin; ph
slightly acidic 4.5- 5; maintain Temperature vasodilation to dissipate heat;
vasoconstriction to retain heat; maintenance of calcium and phosphorus
levels in the bone and blood
Epidermal Appendages: - ✔✔Sebaceous glands secret sebum, Hair
follicles, Eccrine sweat Glands produce sweat, regulate temperature and
eliminate waste; Apocrine sweat glands produce body odor; Nails
Dermal Layers: - ✔✔Two layers: Papillary dermis anchor dermis with
finger like projections; Reticular dermis lower layer offers strength
Collagen, Elastin: - ✔✔Collagen is a protein which gives skin tensile
strength. Type 1 Collagen 77-85%; Type 3 Collagen - 15-23%; Elastin-
Protein which provides the skin with its recoil
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Dermal Cell Types: - ✔✔Fibroblasts produce collagen, elastin,
granulation tissue and growth factors. Macrophages and White Blood Cells
fight infection; Mast Cells initiate inflammation response.
Desmosomes - ✔✔Specialized structures which bind adjacent
keratinocytes to one another and give cohesion to each layer during its
upward progression
Dermis - ✔✔Supports and nourishes epidermis, thick, dense ,
fibroelastic, connective tissue. Highly vascularized, Contains nerves, sweat
glands, sebaceous glands, hair follicles, Produced in bone marrow
Extra cellular matrix (ECM) - ✔✔Largest component of dermis, gel like
matrix produced by the cells that it surrounds
Subcutaneous tissue - ✔✔Lies beneath the dermis and composed of
adipose tissue and fascia, provides cushioning.
Fascia - ✔✔White shiny in appearance, sheath like covering for muscles,
nerves, and blood vessels
Collagenase - ✔✔Endogenous enzyme that breaks collagen bonds
during maturation and remodeling phase.