Pseudostratified columnar epithelia are single layered cells that give the appearance of being made from multiple layers. The nuclei of these epithelial cells are at different levels leading to the illusion of being stratified. However, the tissue is only a single layer of cells and while the cells do not share a common apical surface, each cell is in contact with the basement membrane.
This type of tissue has a secretory and absorptive function.
Transitional epithelium is a stratified tissue made of multiple cell layers, where the cells constituting the tissue can change shape depending on the distention in the organ. When the organ is filled with fluid, cells on the topmost layer of this epithelium can stretch and appear flattened. Alternately, they can also appear cuboidal with a rounded shape when the fluid pressure is low.
The primary function of this tissue is to be an extremely effective permeability barrier, impenetrable to water and most small molecules.
Simple cuboidal epithelium consists of a monolayer of epithelial cells that appear to be square-shaped in cross section. With large, rounded, centrally located nuclei, all the cells of this epithelium are directly attached to the basement membrane. This type of epithelium has diffusion, absorption, secretion, and protection function.
Pseudostratified columnar epithelia are single layered cells that give the appearance of being made from multiple layers. The nuclei of these epithelial cells are at different levels leading to the illusion of being stratified. However, the tissue is only a single layer of cells and while the cells do not share a common apical surface, each cell is in contact with the basement membrane.
This type of tissue has a secretory and absorptive function.
Transitional epithelium is a stratified tissue made of multiple cell layers, where the cells constituting the tissue can change shape depending on the distention in the organ. When the organ is filled with fluid, cells on the topmost layer of this epithelium can stretch and appear flattened. Alternately, they can also appear cuboidal with a rounded shape when the fluid pressure is low.
The primary function of this tissue is to be an extremely effective permeability barrier, impenetrable to water and most small molecules.
Simple cuboidal epithelium consists of a monolayer of epithelial cells that appear to be square-shaped in cross section. With large, rounded, centrally located nuclei, all the cells of this epithelium are directly attached to the basement membrane. This type of epithelium has diffusion, absorption, secretion, and protection function.
References: BD Editors (2017). Retrieved from https://biologydictionary.net/