A group of people were put together to demonstrate what the structure of different types of epithelia looks like. Down below are the pictures with the functions, location and definition of each structure.
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Stratified Cuboidal:
Description- Single layer of cube like cells
Location- Kidney tubules; ducts and secretory portions of small glands; ovary surface
Function- Secretion and absorption
Pseudo-Stratified Cuboidal:
Description- Slightly thicker than squamous
Location- Lines the larger ducts of the mammary glands, sweat glands, and pancreas (protection)
Stratified Columnar:
Description- Single layer of tall cells with round to oval nuclei
Location- Non ciliated type lines most of the digestive tract, gallbladder, and execratory ducts of some glands; ciliated variety lines small bronchi, uterine tubes, and some regions of the uterus
Function- Absorption; secretion of mucus, enzymes, and other substances; ciliated type propels mucus by ciliary action
Stratified Squamous:
Description- Thick membrane composed of several cell layers
Location- Nonkeratinized type forms the moist linings of the esophagus, mouth, and vagina
Function- protects underlying tissues in areas subjected to abrasion
Pseudo-stratified squamous:
Description- Thin cells on top of cells, found on outer layer of the ski
Location- Oral cavity lining, esophagus, vaginal and anal canal (protection due to many layers)
Pseudo-stratified columnar:
Description- Single layer of cells of differing heights, some not reaching the free surface; nuclei seen at different levels; may contain goblet cells and bear cilia
Location- Non ciliated type in male's sperm-carrying ducts and ducts of large glands; ciliated variety lines the trachea, most of the upper respiratory tract
Function- Secretion, particularly of mucus; propulsion of mucus by ciliary action
Transitional:
Description- Resembles both stratified squamous and stratified cuboidal; basal cells cuboidal or columnar; surface cells dome shaped or squamous-like, depending on degree of organ stretch
Location- Lines the ureters, bladder, and part of the urethra
Function- Stretches readily and permits dissension of urinary organ by contained urine
Description- Resembles both stratified squamous and stratified cuboidal; basal cells cuboidal or columnar; surface cells dome shaped or squamous-like, depending on degree of organ stretch
Location- Lines the ureters, bladder, and part of the urethra
Function- Stretches readily and permits dissension of urinary organ by contained urine
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