Cutaenous membrane=
Skin
Epidermis is the
superficial layer of keratinized stratified squamous epithelium
Epidermal Layers
stratum corneum, stratum, lucidum, stratum granulosum, stratum
spinosum, stratum basale.
Stratum Corenum(horny)
25-30 layers of flat, dead cells, completely filled with keratin
Stratum Lucidum (clear)
flat dead cells found only on palms and soles
Stratum Granulosum
layers that contain darkly staining granules
Thin skin=
hairy skin
Stratum Spinosum (thorny)
layers of polyhedral cells that fit closely together & appear to
be covered with prickly spines
Stratum Basale(base)
single layer of cuboidal to columnar shaped cells which divide by
mitosis, produced keratinocytes which push up to the upper layers of
the pidermis
Stratum Basale is AKA
Stratum Germinativum
Dermis
comprised of connective tissue containing collage and elastic fibers
Cells in the dermis
fibroblasts, macrophages, adipocytes
Fibroblasts
produce connective tissue in matrix
Macrophages
phagocytic white blood cells
adiopocytes
fat cells that contain triglyceride
Most common type of skin cancer is
basal cell carcinoma
most deadly type of skin cancer
malignant melanoma
Meissners corpuscles of touch
nerve endings sensitive to touch
Pacinian Corpuscles
sensitive to pressure
Dermal Papillae
small, nipple shaped structures project into the undersurface of the papillae
Subcuteanous layer is called
hypodermis