Epithelium Functions

Front 1

Simple Squamous

Back 1

Functions: diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae
Locations: Kidney glomeruli; air sacs of lungs; lining of heart, blood vessels, and lymphatic vessels; lining of ventral body cavity (serosae).

Front 2

Simple Cuboidal

Back 2

Functions: Secretion and absorption
Location: kidney tubules; ducts and secretory portions of small glands; ovary surface

Front 3

Simple Columnar

Back 3

Functions: absorption; secretion of mucus; enzymes, and other substances; ciliated
Location: digestive tract, gallbladder, uterine tubes, some regions of uterus

Front 4

Pseudostratified Columnar

Back 4

Functions: secretion, part of mucus, propulsion of mucus by ciliary action
Location: nonciliated type in males sperm. ciliated variety lines the trachea, most of the upper respiratory tract

Front 5

Stratified Squamous

Back 5

Function: Protects underlying tissues in area subjected to abrasion
Location:linings of esophagus, mouth, and epidermis of the skin

Front 6

Stratified Cuboidal

Back 6

Function: protection
Location: largest ducts of sweat glands, mammary glands, and salivary glands

Front 7

Stratified Columnar

Back 7

Function: Protection; secretion
Location: in large ducts glands, small amount in male urethra

Front 8

Transitional Epithelium

Back 8

Function: stretches readily and permits distension of urinary organ by contained urine
Location: lines the ureters, ladder, and part of the urethra