Colorado State University
Colorado State University: Basic Functional Anatomy of the Digestive System
This site has a concise description of the digestive system with a nice diagram. The site also provides basic definitions of key parts.
Inner Body
Innerbody: Digestive System
Take a look inside the human body's digestive system. This site features diagrams of the digestive tract and each part is accompanied by labels and descriptions. Just select an organ by moving the mouse over its image.
Discovery Education
Your Digestive System
What do you know about your digestive system? This site feature factoids and more interesting information concerning this human body system. Trace the path of food from one end to the next.