atrioventricular node(n = noun.body) - a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundle;
is a kind of cardiac muscle, heart muscle

ascending node, atrioventricular, atrioventricular block, atrioventricular bundle, atrioventricular nodal rhythm, atrioventricular trunk, atrioventricular valve, axillary node, descending node, left atrioventricular valve, lymph node, mucocutaneous lymph node syndrome, node, right atrioventricular valve, sa node, sinoatrial node