They've got a neurogenic coronary heart, that has rhythmic depolarization that may be answerable for initiating heartbeats.[twenty five]: 653 Heartbeats originate in anxious tissue; innervated muscle cells bring about the heart to contract when stimulated by nerve impulses. The cardiac ganglion, which contains nine neurons, attaches to the dorsal wall https://vany009ofv8.wikilowdown.com/user