Assertion: urethra's sphincter | /r/HasProperty | striated muscle fibers
Facets:
value: unlike the internal sphincter
type: OTHER
Source sentences:
text: The second sphincter is the external urethral sphincter (EUS), composed of striated muscle fibers.
text: Unlike the internal sphincter the external sphincter is composed of striated muscle fibres which are under the voluntary control of the somatic nervous system.