PBS
Pbs Learning Media: Map of the Human Heart
See how the human heart moves blood through the body in this animated feature from the NOVA: "Cut to the Heart" Web site.
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.
PBS
Nova Online: Troubled Hearts
This site contains pictures of hearts that have some type of problem such as narrowing of the arteries and muscle damage from a heart attack. There is also a terrific picture of the coronary artery system that supplies the heart.
Treehut
Suzy's World: Heart
Find out why your heart beats and perform an experiment to see your pulse moving.