AP BIOLOGY

Detailed explanation-1: -Orbicularis oculi is a paired facial muscle that surrounds each orbit and the adjacent periorbital region. Together with corrugator supercilii and levator palpebrae superioris, it belongs to the circumorbital and palpebral group of muscles that surround the eye.

Detailed explanation-2: -The lips are composed of the orbicularis oris muscle that surrounds the mouth and is covered externally by skin and internally by mucous membrane. The upper and lower lips are attached to the gingiva by raised folds of mucous membrane called the labial frenula.

Detailed explanation-3: -Orbicularis Oris The circular muscle around our mouth is Orbicularis Oris and this muscle brings our lips together so we can pucker up for a kiss!

Detailed explanation-4: -In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. It is a sphincter, or circular muscle, but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.

Detailed explanation-5: -The orbicularis oculi is a muscle in the face that closes the eyelids. It arises from the nasal part of the frontal bone, from the frontal process of the maxilla in front of the lacrimal groove, and from the anterior surface and borders of a short fibrous band, the medial palpebral ligament.