Assertion: esophagus's muscle | /r/CapableOf | enlarge the lumen
Facets:
value: to accept the bolus
type: PURPOSE
Source sentences:
text: With the act of swallowing, the longitudinal muscle of the esophageal body shortens, thus enlarging the lumen to accept the bolus (the “on response”), after which the circular smooth muscle contraction forms the peristaltic wave (the “off response”).