Assertion: urethra's sphincter | /r/HasProperty | skeletal muscle
Facets:
Source sentences:
text: This external sphincter is a skeletal muscle used to inhibit urination voluntarily until the proper time.
text: external urinary sphincter: skeletal muscle; must be relaxed consciously to void urine
text: Because the lower external sphincter is skeletal muscle and voluntarily controlled, we can choose to keep it closed or it can be relaxed so that urine is flushed from the body.