Orbicularis oris muscle

What is Orbicularis oris muscle?

Orbicularis oris muscle meaning Muscle of facial expression. Its main function is to close the lips.Other muscles of facial expression include:BuccinatorFrontalisLevator labii superiorisLevator labii superioris alaeque nasiMentalisOccipitalisRisoris Zygomaticus majorZygomaticus minor

 

reference: national Cancer Institute – Glossary for Registrars

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