Glandular Epithelium A gland is one or more cells that produce and secrete a specific product. The product is always a water-based fluid (aqueous) and usually contains proteins (the product is referred to as a secretion). Secretion is considered an active process. Glandular cells obtain substances needed from blood and transform them (chemically) into a […]
Epithelium is one of four basic tissue types and covers the entire surface of our body’s. It’s a specialized tissue and lines all internal and external body surfaces. It’s also the only tissue with polarity. In this article we discuss the five main characteristics of epithelium, review slides of each type, discuss size, shape, and location, and final, classify epithelium into different sub-categories for better understanding and organization.