GENERAL HISTOLOGY

Detailed explanation-1: -A gland can be classified as an endocrine gland, a ductless gland that releases secretions directly into surrounding tissues and fluids (endo-= “inside”), or an exocrine gland whose secretions leave through a duct that opens to the external environment (exo-= “outside”).

Detailed explanation-2: -Simple cuboidal epithelium is found in organs with these functions, such as the ducts of the salivary glands, liver, pancreas and other exocrine glands. It forms thyroid follicles, kidney tubules, seminiferous tubules of male testis, and covers the surface of the ovaries (germinal epithelium).

Detailed explanation-3: -Glandular epithelium is the main component of the secretory portion of glands, the portion which produces and secretes the secretory product. A gland can either be a single secretory cell, such as the goblet cells found in the digestive and respiratory tracts, or a group of secretory cells that form a bigger gland.

Detailed explanation-4: -Glandular epithelium is composed of cells specialized to secrete substances. Exocrine glands secrete into ducts. Endocrine glands secrete intro tissue fluid or blood.