Orbicularis oris: Origin, insertion, innervation, action | Kenhub
https://www.kenhub.com/en/library/anatomy/orbicularis-oris-muscle
webNov 3, 2023 · Orbicularis oris is a complex circular muscle that surrounds the orifice of the mouth and forms the majority of the lips. It belongs to a large group of muscles of facial expression called the buccolabial group. Besides orbicularis oris, this group also contains the levator anguli oris, levator labii superioris alaeque nasi, levator labii ...
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