extrinsic sphincter

ex·trin·sic sphinc·ter

a sphincter provided by circular muscular fibers extraneous to the organ.

Farlex Partner Medical Dictionary © Farlex 2012

(eks-trin'zik sfingk'tĕr)

A sphincter provided by circular muscular fibers extraneous to the organ.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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"In addition, the bottom of your diaphragm sits flush with the LES and acts as an extrinsic sphincter or valve," Dr.

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