28 notecards = 7 pages (4 cards per page)
The main structural features in epidermis of the skin
The dense irregular connective tissue making up the dermis is made of two principle layers
1. Papillary Layer
More superficial dermal region composed of Areolar CT.
The deepest skin layer. Composed of dense irregular connective tissue and contains many arteries and veins, sweat and sebaceous glands, and pressure receptors (Pacinian Corpuscles)
Bed sores (decubitus ulcers)
Occur in bedridden patients that are not turned regularly enough. The weight of the body exerts pressure on the skin, especially over bony projections, which leads to restrictions of the blood supply and tissue death.
in patients with, diabetes (Type II) or burns
When in newborns a chemical called bilirubin rises high
STRUCTURE OF THE NAIL
A single row of cells immediately adjacent to the dermis. Alternate name is Stratum germinativum, 10% to 25% are melanocytes, which thread their processes through this and the adjacent layers of keratinocytes. Also has Tactile cells in this layer.
Stratum Basale (Basal Layer)
Several cell layers immediately superficial to the basal layer. cells in this layer appear spiky.
Stratum Spinosum (Spiky Layer)
Contains granules of two types:
Stratum Granulosum (Granular layer)
Thin translucent band of flattened dead keratinocytes. This layer is found in the palm of hands and soles of the feet.
Stratum Lucidum (Clear Layer)
Consists of 20-30 layers and accounts for the bulk of the epidermal thickness. This is the layer where you would find keratinized cells.
Stratum Corneum (Horny Layer)
The external body covering, protects, insulates, cushions, regulates body temperature, metabolic duties
SKIN, OR INTEGUMENT
Cells of the Epidermis
Keratinocytes, Melanocytes, Epeidermal dendritic cells (Langerhan's Cells), Tactile Cells
melanin, brown pigment
tissue becomes yellowed, is almost always diagnostic for liver disease.
bronzing of the skin hints that a person's adreanl cortex is hypoactive.
Parts of the Nail
Body: The visible attached portions.
Parts of the Nail
Nail Bed: Extension of the stratum basale beneath the nail.
Small bands of smooth muscle cells connect each hair follicle to the papillary layer of the dermis.
Arrector Pili Muscle
A small nipple of dermal tissue that protrudes into the hair bulb from the connective tissue sheath and provides nutrition to the growing hair.
Eccrine Glands (merocrine sweat glands)
distributed all over the body.
found predominately in the axillary and genital areas, these glands secrete a milky protein- and a fat- rich substance excellent nutrient medium for bacterium. and sex glands, secretes pheromones for some animals.
are accumulations of dried sebum, bacteria, and melanin from epithelial cells in the oil duct.
is an active infection of the sebaceous glands.