Assertion: esophagus's muscle | /r/AtLocation | voluntary control
Facets:
Source sentences:
text: The muscles in the upper portion of the esophagus are under voluntary control.
text: The esophagus is a somewhat unique organ in that the muscle in the upper part is under voluntary control, while the muscles of the lower end are under involuntary control.
text: Striated muscles are contractile muscles that are under voluntary control.
text: This is a group of genetic disorders where there is a gradual and progressive deterioration of the skeletal muscles, which are under voluntary control.
text: The external anal sphincter is made of skeletal muscle, which is under voluntary control.