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In jawed vertebrates, the mandible (from the Latin mandibula, 'for chewing'), lower jaw, or jawbone is a bone that makes up the lower – and typically more mobile – component of the mouth (the upper jaw being known as the maxilla). The jawbone is the skull's only movable, posable bone, sharing joints with the cranium's temporal bones.
The jaw in tetrapods is substantially simplified compared to fish. Most of the upper jaw bones (premaxilla, maxilla, jugal, quadratojugal, and quadrate) have been fused to the braincase, while the lower jaw bones (dentary, splenial, angular, surangular, and articular) have been fused together into a unit called the mandible. The jaw articulates ...
The boundaries of each submasseteric space are: the anterior margin of the masseter muscle anteriorly, the parotid gland posteriorly, [1]; the zygomatic arch superiorly, [1] the inferior border of the mandible inferiorly, [1]
Example of a cleft chin (William McKinley) Human jaw front view. The terms cleft chin, [15] chin cleft, [15] [16] dimple chin, [17] [18] or chin dimple [15] refer to a dimple on the chin. It is a Y-shaped fissure on the chin with an underlying bony peculiarity. [19]
Dental anatomy is a field of anatomy dedicated to the ... 10 usually are found in the maxilla (upper jaw) and the other 10 ... and continues along the bottom teeth to ...
In human anatomy, the mouth is the first portion of the alimentary canal that receives food and produces saliva. [2] The oral mucosa is the mucous membrane epithelium lining the inside of the mouth. In addition to its primary role as the beginning of the digestive system, the mouth also plays a significant role in communication.
The facial skeleton comprises the facial bones that may attach to build a portion of the skull. [1] The remainder of the skull is the neurocranium.. In human anatomy and development, the facial skeleton is sometimes called the membranous viscerocranium, which comprises the mandible and dermatocranial elements that are not part of the braincase.
The fimbriated fold of tongue, also plica fimbriata, is a slight fold of the mucous membrane on the underside of the tongue which runs laterally on either side of the frenulum. The free edge of the fimbriated fold occasionally exhibits a series of fringe-like processes. (Fimbria is Latin for fringe).