A major change in the epithelia occurs between the stomach and duodenum. While the stomach is designed to protect itself and avoid self-digestion, the duodenum is specialized for _____ and _____, and its epithelia includes many _____.

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.