Write about the modified columnar epithelium.

Explanation

Some of the cuboidal or columnar cells pet specialized for secret al or columnar cells pet specialized for secretion and are called glandular epithelium. They are mainly of two types: unicellular, consisted mainly of two types: unicellular, consisting of isolated glandular cells gland). On the basis of the mode of pouring of their secretions, alimentary canal), and multicellular, consisting of cluster of cells (salivary the mode of pouring of their secretions, glands are divided into two categories namely exocrine and endocrine glands. Exocrine gian earwax, oil, milk, digestive enzymes and other cell products. These products are to endocrine glands. Exocrine glands secrete mucus, saliva, through ducts or tubes. In contrast endocrine glands do not have ducts. Their secretions hormones are secreted directly into the fluid bathing the gland. The ex ed directly into the fluid bathing the gland. The exocrine glands are classified as unicellular and multicellular glands The multicellular plants are further classified based on the structure as simple and compound glands, based on their secretory units as tubular, alveolar (Acinus) and tubulo alveolar.