Assertion: alimentary canal's layer | /r/CapableOf | shorten the tract
Facets:
Source sentences:
text: The circular layer prevents food from traveling backward and the longitudinal layer shortens the tract.
text: Within the muscularis externa, the circular muscle layer prevents food from traveling backward, while the longitudinal layer shortens the tract.
text: The circular layer prevents food from traveling backward and the longitudinal layer shortens the tract.