Chin
Chin
Chin (/tʃɪn/) is the area of the face below the lower lip and including the mandibular prominence. It is the forward part of the mandible, also known as the lower jaw.
Etymology
The word "chin" comes from the Old English cinn, which is akin to the Old High German kinni both meaning chin. It is also related to the Latin gena meaning cheek and the Greek genys meaning jaw.
Anatomy
The chin is a prominent feature of the lower part of the face. It is formed by the lower front of the mandible and the mental protuberance, a triangular eminence of the bone. The chin serves as the anchor point for several muscles that control the lower lip and jaw. These muscles include the mentalis muscle, the depressor labii inferioris muscle, and the depressor anguli oris muscle.
Related Terms
- Mandible: The lower jawbone in mammals and fishes, which forms the chin.
- Mental protuberance: The forward projection from the inferior part of the body of the mandible that forms the chin.
- Mentalis muscle: A paired central muscle of the lower lip, situated at the tip of the chin.
- Depressor labii inferioris muscle: A facial muscle that helps to depress the lower lip.
- Depressor anguli oris muscle: A facial muscle that helps to lower the corners of the mouth.
External links
- Medical encyclopedia article on Chin
- Wikipedia's article - Chin
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