• vomer
  • Although a similar pattern was present in primitive tetrapods, the palatine bone is reduced in most living amphibians, forming, in frogs and salamanders, only a narrow bar between the vomer and maxilla. (wikipedia.org)
  • The vomer (/ˈvoʊmər/) is one of the unpaired facial bones of the skull. (wikipedia.org)
  • The vomer forms the inferior part of the nasal septum, with the superior part formed by the perpendicular plate of the ethmoid bone. (wikipedia.org)
  • The vomeronasal organ, also called Jacobson's organ, is a chemoreceptor organ named for its closeness to the vomer and nasal bones, and is particularly developed in animals such as cats (who adopt a characteristic pose called the Flehmen reaction or flehming when making use of it), and is thought to have to do with the perception of certain pheromones. (wikipedia.org)
  • The development of the hard palate beneath the vomer means that the bone is now located in a nasal chamber, separate from the mouth. (wikipedia.org)
  • Skull
  • Choose the skull with a natural appearance, for a realistic depiction of the bones, or the model with colored parts that reinforce students' memory of each section. (wardsci.com)
  • The eye is protected from mechanical injury by being enclosed in a socket, or orbit, which is made up of portions of several of the bones of the skull to form a four-sided pyramid, the apex of which points back into the head . (britannica.com)
  • The top of the braincase consists of the strongly-fused frontal bone and parietal bone, which curve sharply downwards near the back so as to produce a rounded back of the skull. (wikipedia.org)
  • The nasal, a bone at the top of the skull behind the nostrils, is relatively long. (wikipedia.org)
  • The greater palatine canal (or pterygopalatine canal) is a passage in the skull that transmits the descending palatine artery, vein, and greater and lesser palatine nerves between the pterygopalatine fossa and the oral cavity. (wikipedia.org)
  • The typical snake skull has a solidly ossified braincase, with the separate frontal bones and the united parietal bones extending downward to the basisphenoid, which is large and extends forward into a rostrum extending to the ethmoidal region. (wikipedia.org)
  • The lamina papyracea (or orbital lamina) is a smooth, oblong bone plate which forms the lateral surface of the labyrinth of the ethmoid bone in the skull. (wikipedia.org)
  • The external naris (the nostril opening in the skull) is bordered only by the premaxillae bones. (wikipedia.org)
  • mandible
  • Morphologically, the sides of the snout are parallel (unlike the spoon-tipped snouts of Gnathosaurus), most of the mandible is composed mainly of the dentary, and the well-developed retroarticular process is formed by the angular bone like in other ctenochasmatids. (wikipedia.org)
  • In both the transverse bone and the supratemporal are absent, but the coronoid element is present in the mandible. (wikipedia.org)
  • ectopterygoid
  • the pterygoid is connected with the maxillary by the ectopterygoid or transverse bone, which may be very long, and the maxillary often emits a process towards the palatine, the latter bone being usually produced inwards and upwards towards the anterior extremity of the basisphenoid. (wikipedia.org)
  • Caipirasuchus also has large pterygoid and ectopterygoid bones and a well-developed hole in front of the eye sockets called the antorbital fenestra. (wikipedia.org)
  • nerves
  • haversian canal any of the anastomosing channels of the haversian system in compact bone, containing blood and lymph vessels, and nerves. (thefreedictionary.com)
  • Its surface is marked by numerous furrows for vessels and nerves and by the grooves for the nasopalatine nerve, and is traversed by sutures connecting the bones of which it is formed. (imaios.com)
  • teeth
  • The maxilla contains 25 tooth sockets, some with teeth. (wikipedia.org)
  • A buttress of bone runs along the inside of the jaw above the sockets of the caniniform teeth, strengthening the jaw. (wikipedia.org)
  • While most snakes are not hazardous to humans, several lineages have evolved venom which is typically delivered by specialized teeth called fangs located on the maxilla. (wikipedia.org)
  • orbit
  • The seven bones which articulate to form the orbit. (wikipedia.org)
  • The postfrontal bone, usually present, borders the orbit behind, rarely also above, and in the pythons a supraorbital bone is intercalated between it and the prefrontal bone. (wikipedia.org)