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palatoquadrate

palatoquadrate

9.9
A firm, bendy part of the upper jaw in some fish that helps the jaw move
  • noun
  • /ˌpælətəˈkwɑːdreɪt/
  • Specialized
: palatoquadrado
  • The palatoquadrate is a crucial component of the jaw structure in certain fish species.

Examples

  • The upper sections of the mandibular arch form the upper jaw (palatoquadrate), and the lower sections form Meckel's cartilage, which gives rise to the lower jaw.

    Academic text (2003)
  • Meckel's cartilage attaches at the posterior portion of the palatoquadrate, next to the anterior attachment of the hyomandibula.

    Academic text (2003)
  • The stapes was already resting against the quadrate, where it supported the palatoquadrate.

    Academic text (2003)
  • In the autostylic architecture, the palatoquadrate is essentially fused to the chondrocranium.

    Academic text (2003)
  • Their jaws are attached to the brain case mainly by the hyomandibula, and palatoquadrate connections 1 and 3 are replaced by ligaments.

    Academic text (2003)
  • These portions of the palatoquadrate and Meckel's cartilage are called the quadrate in the upper jaw and the articular in the lower jaw.

    Academic text (2003)
  • At this point in the evolutionary process, the palatoquadrate was completely fused with the chondrocranium to form a true autostylic jaw suspension, and it was covered almost entirely by dermal bone.

    Academic text (2003)
  • There is a space between the otic capsule and the ascending process of the palatoquadrate where cranial nerve VII exits the skull posteriorly.

    Academic text (2003)
  • Developed in the dermis and capable of beating rooted teeth, dermal bone was laid down over the entire original chondrocranium on the undersurface of the palatoquadrate and the anterior portion of Meckel's cartilage.

    Academic text (2003)
  • In the anatomy of some vertebrates, the palatoquadrate plays a supportive role in the upper jaw.

Surface Forms

Morphology

palatoquadrate = quadrate (opaque) = palato + quadrate

Technical combining forms from anatomy make the precise meaning inaccessible to average learners without specialized knowledge.

Etymology

Palatoquadrate comes from two parts: palato- meaning 'palate' or 'roof of the mouth' and quadrate meaning 'square' or 'four-sided'. The name gives a simple image of a 'square' piece by the palate, which helps you remember it is the cartilage that supports the upper jaw in fish and other animals with a backbone.