They've a neurogenic coronary heart, that has rhythmic depolarization that is definitely responsible for initiating heartbeats.[25]: 653 Heartbeats originate in anxious tissue; innervated muscle cells trigger the center to agreement when stimulated by nerve impulses. The cardiac ganglion, which contains 9 neurons, attaches towards the dorsal wall of the heart. https://abduly110riy9.wikibestproducts.com/user