This muscle closes the mouth and puckers the lips when it contracts. Orbicularis oris muscle also known as musculus orbicularis oris is a complex multi layered muscle which attaches through a thin superficial musculoaponeurotic system to the dermis of the upper lip and lower lip and serves as an attachment site for many other facial muscles around the oral region.
Head Muscles Stock Image C020 0370 Science Photo Library
Until recently it was misinterpreted as a sphincter or circular muscle but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.
Oris anatomy. Here is an overview of each part. While this action is a requirement for kissing the puckering action is used in a number of other ways. The orbicularis oris is a complex muscle consisting of fibers that completely encircle the mouth.
It is also one of the muscles used in the playing of all brass instruments and some woodwind instruments. In human anatomy the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. The orbicularis oris muscle is the muscle that surrounds the mouth and makes up the bulk of the lips.
The muscle inserts directly into the lips. In common language the orbicularis oris is often referred to as the kissing muscle it allows for facial expression and more specifically it is responsible for puckering the lips. Pulp this is the soft tissue found in the center of all.
Each tooth has several distinct parts. Its function is apparent when pursing the lips as occurs during whistling. Dentin this is the layer of the tooth under the enamel.
Enamel this is the outer and hardest part of the tooth that has the most mineralized tissue in. Some of its fibers originate near the midline from the maxilla superiorly and the mandible inferiorly whereas other fibers are derived from both the buccinator in the cheek and the numerous other muscles acting on the lips. The depressor anguli oris muscle attaches to the outer edges of the orbicularis oris muscle.
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