_____ is a tissue which consists of two layers of round or square cells which separate an open space from a basal or reticular lamina. While most tissue types are found throughout the body, this one is rare and is only seen in sweat and mammary glands.

3000+ review questions on anatomy and physiology. 

Anatomy refers to the internal and external structures of the body and their physical relationships, whereas physiology refers to the study of the functions of those structures.