Truncus Atrioventricularis is a term used in anatomy that describes a portion of the heart that connects the atria and the ventricles. This structure is also called the atrioventricular bundle or the bundle of His. The bundle of His is an essential component of the heart's electrical conduction system, which assists the heart in contracting and pumping blood throughout the body. There are several synonyms for the term Truncus Atrioventricularis, including atrioventricular bundle, The bundle of His, His bundle, AV bundle, the atrioventricular node, and the AV node. These synonyms are often used interchangeably in medical literature and discussions regarding heart anatomy and physiology.