physiologic sphincter

phys·i·o·log·ic sphinc·ter

a section of a tubular structure that acts as if it has a band of circular muscle to constrict it, although no such specialized structure can be found on morphologic examination.

phys·i·o·log·ic sphinc·ter

(fiz'ē-ŏ-loj'ik sfingk'tĕr)
A section of a tubular structure that acts as if it had a band of circular muscle to constrict it, although no such specialized structure can be found on morphologic examination.
Synonym(s): radiologic sphincter.
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