It is initiated by the cricopharyngeus following the opening of the upper s
It is initiated by the cricopharyngeus following the opening of the upper sphincter, and terminates 8-9 seconds later, regardless of the motion of the bolus. Longitudinal smooth muscles shorten the tract (*) while a wave of contractions of circular muscles prevents backward flow. Responsible for the ability to eat hanging upside down or in space, FTP, name this process in which the involuntary muscles of the esophagus push swallowed food down the gullet.
It is initiated by the cricopharyngeus following the opening of the upper sphincter, and terminates 8-9 seconds later, regardless of the motion of the bolus.
{Peristalsis}