UPPER JAW Meaning and
Definition
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The upper jaw, also referred to as the maxilla, is an anatomical structure in vertebrates, including humans, that forms the front portion of the skull. It is positioned above the lower jaw or mandible, and together they enclose the oral cavity and house the teeth.
In humans, the upper jaw consists of two opposing maxillary bones, which are fused together during development. These bones form the upper dental arch, where the majority of the teeth are anchored. The upper jaw provides support for the nose, as it contributes to the formation of the nasal cavity and its surrounding structures. It also plays a vital role in the formation of the eye sockets, known as the orbits.
The maxilla extends upwards and connects with other structures of the skull, such as the frontal bone, nasal bones, and ethmoid bone. It contains several openings, including the maxillary sinuses, which are air-filled cavities. These sinuses help reduce the weight of the skull and have a role in resonation during speech.
The upper jaw is responsible for essential functions, including biting, chewing, and speaking, as it houses the upper set of teeth and helps in the articulation of various sounds. Furthermore, the upper jaw contributes to the overall facial appearance and symmetry, playing a crucial role in aesthetics.
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Superior maxilla, maxilla.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for UPPER JAW
- ypper jaw
- hpper jaw
- jpper jaw
- ipper jaw
- 8pper jaw
- 7pper jaw
- uoper jaw
- ulper jaw
- u-per jaw
- u0per jaw
- upoer jaw
- upler jaw
- up-er jaw
- up0er jaw
- uppwr jaw
- uppsr jaw
- uppdr jaw
- upprr jaw
- upp4r jaw
Etymology of UPPER JAW
The word "upper" comes from the Old English word "uppest", which evolved from the Old English word "ufor" meaning "higher" or "more elevated". It can be traced back to the Proto-Germanic word "uberaz".
The word "jaw" originated from the Middle English word "jowe", derived from the Old English word "ceowan" which means "to chew". The Old English word "ceowan" shares its roots with the Proto-Germanic word "kewwan", and both likely have their origins in the Proto-Indo-European root word "gʷebh".
When combined, "upper jaw" refers to the part of the face that is higher and responsible for chewing.
Similar spelling words for UPPER JAW
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