Human Body Pathfinder

Digestive System

My Body 
    This is an easy site by KidsHealth organization that is didvided into the following categories: Bones; brain; digestive system; ear; eye; hair; heart; kidneys; lungs; muscles; nails; nose; skin; teeth; and tongue. 

Heart

The Heart: An Online Exploratorium
    The Franklin Institute provides this outstanding site related to the heart.