Location of pacemaker in chick embryo heart at the time of initiation of heartbeat.
D000818:Animals; D016275:Atrial Function; D002642:Chick Embryo; D004594:Electrophysiology; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000196:embryology*; D016276:Ventricular Function