Assertion: esophagus's sphincter | /r/HasProperty | involuntary muscle
Facets:
Source sentences:
text: In contrast, the internal anal sphincter is an involuntary muscle that is in a state of continuous maximal contraction and relaxes in response to rectal distension (Sangwan and Solla, 1998).
text: In contrast, the internal anal sphincter is an involuntary muscle that is in a state of continuous maximal contraction and relaxes in response to rectal distension (Sangwan and Solla, 1998).