Epithelial Tissues Flashcards
What is the location, structure, and function of Simple Squamous
Comprise the endothelium(lining the blood and lymph vessels) and the mesothelium(lining of the serous membranes)
A single layer of flat cells
Allow diffusion and filtration in the lining of the air sacs of the lungs and the renal glomeruli
What is the location, structure, and function of Stratified Squamous
Make up the epidermis of the skin(keratinized) and the lining of the mouth, esophagus, and vagina (non-keratinized)
Multiple layers of cells piled on top of each other. Can be cuboidal or even columnar in the basal layers, but change to flat cells nearer the apical layer.
Most apical layers are either keratinized(dry and waterproof) or moistened with mucous
What is the location, structure, and function of Simple Cuboidal
Lines of ovaries, renal tubules, and secreting portions of many glands(thyroid, pancreas…)
A single layer of cells, evenly tall as they are wide, slightly narrower at the apical surface
Can absorb and secrete
What is the location, structure, and function of Stratified Cuboidal
Line some sweat glands and the male urethra
2 layers of cells as wide as they are tall
Minor role in absorption and secretion
What is the location, structure, and function of Non-Ciliated Simple Columnar
Line the digestive tract from stomach to anus
a single layer of tall cells with microvilli at the apical surface
secrete mucus to protect epithelial linings from friction, stomach acid, etc…
What is the location, structure, and function of Ciliated Simple Columnar
Line bronchioles, fallopian tubes, and the uterus
A single layer of tall cells with cilia at the apical surface.
“sweep” material across the apical surface. Goblet cells are interspersed to secrete protective mucous
What is the location, structure, and function of Non-Ciliated Pseudostratified Columnar
Line epididymis and secretory part of glands
Still, one layer of tall cells all attach to the basement membrane, but not all extend to the apical surface. No goblet cells associated
Large cells absorb and secrete
What is the location, structure, and function of Ciliated Pseudostratified Columnar
Line the upper respiratory tract(trachea)
Still, one layer of tall cells all attach to the basement membrane, but not all extend to the apical surface. Goblet cells associated.
Cilia “sweep” particles along the apical surface
What is the location, structure, and function of Stratified Columnar
Line the secretory portion of some glands
One layer of tall cells stacked on top of one layer of shortened, irregularly shaped cells
Minor role in secretion
What is the location, structure, and function of Transitional
Line the urinary bladder
Multiple layers of cells that change depending on how far they are stretched
Built for holding fluid without rupturing
Compare and contrast endocrine and exocrine secretion
Endocrine
Glands that secrete their contents directly into the blood
Exocrine
Glands that secrete their contents into a lumen or ducts (and then out of a covering/lining)
- Mucus, sweat, oil, earwax
