Some columnar (or) cuboidal cells get specialized for secretion and are called?

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Some of the columnar or cuboidal cells get specialised for secretion and are called 'glandular epithelium'. They are mainly of two types: unicellular and multicellular

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Some columnar or cuboidal cells get specialized for secretion this are called glandular epithelium.. it may be unicellular or multi cellular.. unicellular glands consists of isolated goblet cells (mucus secreting cells).. multicellular glands consists of cluster of cells such as selivery glands.. this are classified on the basis of ducts endo crine(duct less glads)and exocrine glands(with ducts) .. endo crine glands secreats hormones like insulin, glucagon etc.. exo crine glands produce enzymes, saliva, sebum etc.. on the basis of secretion exocrine glands divides into three types1) merocrine glands secrets it's secretion with out loss of cellular subuctance ex. pancreas2)apocrine glands secrets it's secretion loss of apical part of cell ex. mammary glands 3)hole crine glad secrets it's secretion lose of hole cell ex. sebaceous glands..

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Glandular epithelium

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- **Specialized cells for secretion**
Columnar or cuboidal cells that get specialized for secretion are called glandular cells. These cells are primarily found in glands throughout the body and are responsible for producing and releasing various substances such as hormones, enzymes, and mucus.
- **Types of glandular cells**
There are two main types of glandular cells: exocrine and endocrine glands. Exocrine glands secrete their products into ducts, which then carry the secretions to the surface of the body or into a body cavity. Endocrine glands, on the other hand, secrete their products directly into the bloodstream, where they can travel to target organs or tissues.
- **Features of glandular cells**
Glandular cells are characterized by their high secretory activity and often contain a large amount of rough endoplasmic reticulum and Golgi apparatus to facilitate the production and packaging of secretory products. These cells may also have specialized structures such as secretory vesicles or granules to store and release their products.
- **Examples of glandular cells**
Some examples of specialized glandular cells include the goblet cells in the lining of the respiratory and digestive tracts, which secrete mucus to protect and lubricate the epithelial surfaces. Another example is the pancreatic acinar cells, which secrete digestive enzymes into the small intestine to aid in the digestion of food.
- **Importance of glandular cells**
Glandular cells play a crucial role in maintaining homeostasis and regulating various physiological processes in the body. Without these specialized cells, the body would not be able to produce essential substances needed for digestion, growth, and overall health.

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