what is columnar epithelium???
according to class 9th...
Answers
The columnar (meaning 'pillar-like') epithelium facilitates movement across the epithelial barrier. It is present where absorption and secretion occur, as in the inner lining of the intestine, tall epithelial cells are present.
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Epithelial tissues are thin tissues that cover the entire body's exposed surface. They cover a variety of body parts, including the inner lining of the mouth, the digestive tract, secretory glands, and the lining of hollow organ sections such as the heart, lungs, eyes, and the urogenital tract.
Explanation: Columnar epithelium is a part of Epithelial tissue.
Columnar Epithelium: This form of tissue has a column-like morphology with a higher height than width. Ciliated columnar epithelium and glandular columnar epithelium are the two forms of columnar epithelium.
The columnar epithelium is made up of column-shaped epithelial cells. The columnar epithelium is made up of cells that are taller than they are wide. Its width is around four times its height. Each cell's nucleus is elongated and frequently found near the base. Microvilli may be present on the apical surface of some of them. The microvilli enhance the surface area when they are present (such as during absorption). Cilia may be present as well. Mucus mobility is aided by ciliated columnar cells.