How now esophageal persistalsis?
D003679:Deglutition; D004947:Esophagus / Q000294:innervation / Q000502:physiology*; D006801:Humans; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000294:innervation; D009132:Muscles / Q000294:innervation*; D014630:Vagus Nerve / Q000502:physiology