Simple Cuboidal

Simple Columnar

Simple Squamous

- single layer of tall cells
- serves in secretion and absorption of substances
- located in digestive tract, gallbladder, small bronchi, uterine tubes, and some parts of the uterus

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- one layer of flattened cells
- used to allow easy exchange of substances
- located mainly in the sacs of lungs, lining of the heart, and blood vessels

- single layer of cube-like cells
- serves in secretion and absorption of substances
- located in ovary surface, kidney tubules, and ducts and secretory parts of small glands

Stratified Squamous

Pseudostratified Columnar

Transitional

- surface cells are squamous and keratinized, while basal cells are active cuboidal or columnar
- protects underlying tissue
- keratinized forms skin, other forms lining of esophagus and vagina

- single layer with differing heights
- secretion, especially mucus
- sperm-carrying ducts and trachea

- surface cells dome shaped or squamouslike, basal cells are cuboidal or columnar
- stretches readily and confines urine
- lines ureters, bladder, and part of urethra