COLUMNAR CELL Meaning and
Definition
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A columnar cell refers to a type of epithelial cell characterized by its tall and elongated shape, resembling a column or pillar. These cells are typically found in epithelial tissues that line various organs and cavities of the body, serving different functions based on their location. The distinctive shape of columnar cells allows for a greater surface area compared to other cell types, enabling them to efficiently absorb nutrients, secrete substances, or provide protection.
Columnar cells have a single layer or multiple layers, depending on the tissue they are present in. They are held together by specialized cell junctions, such as tight junctions or desmosomes, forming a solid barrier that prevents leakage of fluids and proteins between the cells. This barrier function is particularly important in tissues involved in absorption and secretion, such as the intestines and glands.
Columnar cells are known for their polarization, meaning they have distinct functional regions or domains. The apical surface of these cells faces the lumen or external environment, and it often possesses microvilli or cilia to increase surface area for absorption or movement. The basal surface, on the other hand, is adjacent to the underlying connective tissue and is involved in anchoring the cell and exchanging molecules with the extracellular matrix.
In summary, columnar cells are specialized epithelial cells with a tall, elongated shape, found in the lining of various organs and body cavities. They play essential roles in absorption, secretion, and protection, and exhibit cellular polarization.
Common Misspellings for COLUMNAR CELL
- xolumnar cell
- volumnar cell
- folumnar cell
- dolumnar cell
- cilumnar cell
- cklumnar cell
- cllumnar cell
- cplumnar cell
- c0lumnar cell
- c9lumnar cell
- cokumnar cell
- copumnar cell
- cooumnar cell
- colymnar cell
- colhmnar cell
- coljmnar cell
- colimnar cell
- col8mnar cell
- col7mnar cell
Etymology of COLUMNAR CELL
The term "columnar cell" is derived from the Latin word "columna", meaning column or pillar, and the suffix "-ar", which generally indicates a relationship or pertaining to something. In the context of biology, a columnar cell refers to a type of cell that has a tall and elongated shape resembling a column or pillar.
