Classifications of epithelia and glands

Simple

single layer

stratified

more than one layer

squamous- thin disc shapes

cuboidal- as wide as is tall, central nucleus

columnar- taller than is wide, elongated nucleus

thin flat, single layered cells

simple squamous epithelia

single layer, cube-shaped with single central nucleus

simple cuboidal

taller than they are wide, single layered, may be ciliated

simple columnar epithelia

simple and pseudostratified columnar epithelia

heterogenous epithelia

multiple stacked layers of cells

stratified squamous epithelia

can be found in certain glands and ducts

stratified cuboidal

multiple layered stacked cells found in areas needing protection and secretion

stratified columnar epithelia

cuboidal epithelial cells with umbrella shaped apical surfaces usually in urinary system

transitional epithelia

water fluids like sweat and mucin in areas that dont grow hair ( palms, soles and foreheads)

merocrine (eccrine) gland

sweat released from more personal areas (armpit and groin)

apocrine glands (smelly gland)

accumulates secretions (oil) and ruptures

holocrine glands

watery, enzyme rich secretions

serous glands

watery secretions in rich gycoprotein mucin

mucous gland

serous and mucous secretions

mixed (seromucous) exocrine glands

what cells are in the apical layer

squamous

what cells are in the basal layer

columnar or cuboidal