Band of specialized cardiac muscle fibers connecting the atria with the ventricles of the heart.
Note: These muscle fibers conduct the electrical impulse that regulates the heartbeat from the right atrium to the ventricles.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 732 (https://doi.org/10.1515/pac-2015-1202)