GENERAL HISTOLOGY

Detailed explanation-1: -The columnar epithelium may be classified according to the number of layers that make it up. For example, a simple columnar epithelium is one that which is made up of a single layer of columnar epithelial cells. A stratified columnar epithelium is comprised of more than one layer of columnar epithelial cells.

Detailed explanation-2: -Enterocytes are the major cell type in intestinal epithelium. They are simple columnar epithelial cells and play important roles in nutrient absorption (e.g., ions, water, sugar, peptides, and lipids) and in secreting immunoglobulins.

Detailed explanation-3: -Solution : The columnar epithelium is composed of a single layer of tall and slender cells. Their nuclei are located at the base. Free surface may have microvilli. They are found in the lining of stomach and intestine and help in secretion and absorption.

Detailed explanation-4: -Simple squamous epithelial cells form a membrane that allows selective diffusion of materials to pass through. Diffusion helps with filtration, absorption and secretion functions.