The stratified epitheliums are composed of several layers of cells that vary in shape and size. The stratified columnar epithelium consists of a single layer of columnar cells with several layers of _cuboidal_ cells underneath.
The morphology of each epithelium is correlated with its functions.
The function of epitheliums with cubic or columnar cells is to transport substances.
There are two main types of epitheliums according to the number of cell layers,
The stratified epithelium is composed of several layers.
Cells in each layer vary in shape and size from the cells of the other layers.
Its general function is to provide a protection barrier in areas that are ore exposed, and certain degree of waterproofing.
Stratification correlates with transepithelial impermeability and friction exposure.
We can divide it into:
The stratified columnar epithelium is not that common.
One of the layers is composed only of columnar cells, and the remaining layers are composed of cuboidal cells.
As it characterizes as being impermeable, it does not allow the diffusion of water and nutrients into the bloodstream.
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