Try to identify each of the human body's major organs in this interactive activity.

Describes the anatomy of a frog's digestive system and how the stages in the process of digestion. A comparison is made with the human 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.

An online biology textbook on the structure and function of the kidneys. Full of labeled, color diagrams for better understanding.