Estrella Mountain Community College
Estrella Mountain Community College: The Execretory System and Nephrons
This resource provides general information about the human excretory system and kidneys, and a section only about nephrons. It includes several pictures, diagrams and explanations for understanding.
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.
Biology Pages
Kimball's Biology Pages: The Kidneys
An online biology textbook on the structure and function of the kidneys. Full of labeled, color diagrams for better understanding.