Explanation:
Transitional epithelium contains cells that readily flatten and stretch (from rounded cuboids to flattened structures) in response to changes within the involved organ e.g. the bladder. This tissue type acts as an impermeable layer, maintaining the osmotic balance of surrounding tissues and organs. Mainly found in the urinary system, the presence of muscular tissue, aids in the change of shape as the organ fills with fluid (contraction and relaxation). The ability to change the capacity of the organ by altering the tissue, allows the transitional epithelium to carry out its function.
Epithelial cells form sheets covering exterior surfaces and internal organs; A many-layered epithelium with cuboidal basal cells and flat cells at its surface would be classified as stratified squamous epithelium. Tissues composed of multiple squamous cell layers on a basement membrane are called epithelia. These line the skin and internal cavities such as blood vessels, esophagus, and mouth. It protects against bacterial entry, and damage. The flat basal cells found on the basement membrane divide and differentiate to form cuboidal or columnar cells; these are typically underneath the squamous cells layers and are layered related to their degree of differentiation.
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