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Cassandra Maureen Uy posted an update in the group
MT 30 LAB – H 4 years, 1 month ago -
Epithelial tissues coat body surfaces, line body cavities and hollow organs, and make up the bulk of gland tissue. Protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception are just a few activities they conduct. -
1. The transitional epithelium is a stratified tissue consisting of many cell layers wherein the cells can change form depending on the organ’s distention. The cells on the topmost layer appear to stretch and flatten when the organ is full of fluid. When the fluid pressure is low, they might also appear cuboidal with a rounded shape. This epithelium is typically found in the urinary bladder, ureters and urethra, and prostate glands ducts. Moreover, its main function is to act as an exceptionally effective permeability barrier, impenetrable to water and tiny molecules due to its placement in the excretory system.
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2. The simple squamous epithelium consists of a single layer of flattened cells. This epithelial lines all blood vessels’ inner surface (endothelium), the wall of alveolar sacs in the lung, and the body cavities (mesothelium). The basic function of simple squamous epithelia is to allow gases and tiny molecules to diffuse more easily.
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3. The simple cuboidal epithelium consists of cells that are as high as they are broad in a single layer. Secretion and absorption are two important activities of this epithelium. The small collecting ducts of the kidneys, pancreas, and salivary glands all have this epithelial.
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