This is a plastinated deer heart that has been cut to highlight the Right and Left Atria and the Right Ventricle. This highlights most of the path that blood takes through the heart in relation to the exterior of the heart. In adition, the cut highlights the subvalvular apparatus.
To learn more about cardiac anatomy, visit the [Atlas of Human Cardiac Anatomy](http://www.vhlab.umn.edu/atlas/index.shtml).