Science
1.Name the different types of epithelial tissues.
2. Explain about squamous epithelial tissues.
3. Where are columnar epithelial tissues found. State its function.
4. Why some cuboidal epithelial tissues are called as glandular epithelial tissues?
Answers
Answer:
There are three principal cell shapes associated with epithelial cells: squamous epithelium, cuboidal epithelium, and columnar epithelium. There are three ways of describing the layering of epithelium: simple, stratified, and pseudostratified.
A simple squamous epithelium is a single layer of flat cells in contact with the basal lamina (one of the two layers of the basement membrane) of the epithelium. This type of epithelium is often permeable and occurs where small molecules need to pass quickly through membranes via filtration or diffusion.
Columnar epithelium forms the lining of the stomach and intestines. The cells here may possess microvilli for maximizing the surface area for absorption, and these microvilli may form a brush border. Other cells may be ciliated to move mucus in the function of mucociliary clearance.
Simple cuboidal epithelium is a type of epithelium that consists of a single layer of cuboidal (cube-like) cells. These cuboidal cells have large, spherical and central nuclei.
Simple cuboidal epithelium
Simple cuboidal epithelium in the pig kidney. The surfaces of the large and small collecting ducts (a and b), the circular structures, are surrounded by the simple cuboidal epithelium.
Simple cuboidal epithelia are found on the surface of [ ovaries], the lining of nephrons, the walls of the renal tubules, and parts of the eye and thyroid.
On these surfaces, the cells perform secretion and absorption.
Answer:
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