dr.v test

Consists of skin hair nails and cutaneous glands

is stratified squamous epithelium

• another connective tissue layer below the dermis
• more areolar and adipose than dermis
• binds skin to underlying tissues
• drugs introduced by injection

keratinized stratified squamous epithelium –dead cells at the surface packed with tough protein – keratin

a single layer of cuboidal to low columnar stem cells and keratinocytes resting on the basement membrane –melanocytes and tactile cells are scattered among the stem cells and keratinocytes

• consists of several layers of keratinocytes
• thickest stratum in most skin
• dendritic cells found throughout this stratum

thin translucent zone

• up to 30 layers of dead, scaly, keratinized cells
• resistant to abrasion, penetration, and water loss

• connective tissue layer beneath the epidermis
• hair follicles and nail roots are embedded in dermis

deeper and much thicker layer of dermis

consists of a bulb, shaft and root

• anagen-growth stage 90% of scalp follicles at any given time
• catagen - degenerative stage - mitosis in the hair matrix ceases and sheath cells below the bulge die
• telogen - resting stage - when papilla reaches the bulge

• bone
• blood
• cartilige
• connective tissue

• simple
• pseudostrafied columnar
• stratified

a flat sheet of closely adhering cells , one or more cells thick, with the upper surface usually exposed to environment or to external space of the body.

• squamous
• cubodial
• columnar

has one layer of cells

shorter cells are covered over by taller ones, epithelium looks startified but every cell reaches basement membrane

wineglass shaped mucus that is secreted

ranges from 2-20 or more layers of cells with cell resting directly on each other and only depest layer is attached to basement membrane