Cuboidal cells are usually arranged in single rows with centrally placed spherical nuclei. They are attached to a basal surface.
They aid in secretion, protection, and absorption. These cells are found in the lining of kidney tubules, bronchioles of lungs, and in the ducts of various secretory glands like salivary, pancreas, and thyroid glands.
Glandular epithelial cells:
Glandular epithelial cells are cuboidal cells. Some of the cuboidal cells get modified for secretion and are called the glandular epithelium.
Glandular epithelium is divided into two types- unicellular (e.g. goblet cells) and multicellular (e.g., salivary gland).