Atrioventricular septum - Septum atrioventriculare
The atrioventricular septum is the part of the membranous part of the interventricular septum, located above the root of the septal cusp of the mitral valve, between the right atrium and the left ventricle.
This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. (2004, July 22). FL: Wikimedia Foundation, Inc. Retrieved August 10, 2004, from http://www.wikipedia.org