Science Museum of Minnesota
Science Museum of Minnesota: Habits of the Heart
A guide to the heart, lungs, and circulatory system, and surgical procedures of the heart. Includes many digital images. Lesson plans with pictures and video instructions are very helpful.
University of Utah
University of Utah: Cardiovascular Pathology Index
This site features a detailed index of photographs for cardiovascular pathology. You can see what a normal human heart looks like and what a sick one looks like too. Come and check it out.
Inner Body
Innerbody
Explore the human body like never before. Resource presents hundreds of interactive anatomy pictures and descriptions of thousands of objects in the body.