part of part of in taxon results in development of cardiac conduction system development atrioventricular node development dph 2009-10-01T02:05:13Z The process whose specific outcome is the progression of the atrioventricular (AV) node over time, from its formation to the mature structure. The AV node is part of the cardiac conduction system that controls the timing of ventricle contraction by receiving electrical signals from the sinoatrial (SA) node and relaying them to the His-Purkinje system. GO:0003162 AV node development cardiac muscle tissue development anatomical structure development Vertebrata <vertebrates> atrioventricular node