Integument

This is where rapid cell division occurs

Cell division occurs in deepest portion

Keratinization begins

Only present in thick skin (palms/soles)

Highly keratinized top layer

Phagocytes in stratum spinosum,
communicates with lymphatic system

Corresponds with sensory nerve ending in stratum basale
responds to light touch

Melanin producing cells in stratum basale,
extension project into other layers

Basal Cell

Squamous Cell

Melanoma

Cells divide more frequently,
results in red patches with silvery scales

Blood supply occluded

Contain dermal papillae, Increase surface area between epidermis,
most abundant in hands and feet

Dense, irregular CT, contains collagen, elastin
connects epidermis to underlying tissue

Supply fluid transfer to epidermis, regulate temperature

Erector pili muscle cells pull on hair follicle

Other smooth muscle cells move skin

Skeletal muscles anchor to dermis in face

Afferent and efferent

Merocrine aka Eccrine (water perspiration)

Apocrine (viscous - found in axillary region, groin, areola)

Modified Apocrine