functions of the skull A. \_\_\_\_\_ for the \_\_\_\_\_ B. \_\_\_\_\_ to house \_\_\_\_\_ C. openings for \_\_\_\_\_ D. \_\_\_\_\_
protective cavity brain cavities sensory organs air and food passage mastication
skull bones
22 paired unpaired cranial facial immovable joints sutures mandible jaw synovial
cranial bones
A. cranial bones are, specifically, the _____ bones that _____ and _____ the _____. the superior portion of the cranium is also referred to as the _____
B. occipital
-from latin occipitum = the back of the head and occipio = begin or commence
–at birth, the occipital portion of the skull is “born” first
eight encase protect brain calvaria flat posterior inferior foramen magnum base anterior aspect occipital bone spinal cord external occipital protuberance (occiput) posterior midline superior nuchal line laterally occiput inferior nuchal line superior nuchal line laterally occipital condyles anterolateral aspects foramen magnum first cervical vertebrae basilar part anterior foramen magnum sphenoid clivus
parietal (_____ bones)
-the _____ parietal bones are located at the _____ and _____ aspect of the cranium
2 walls skull two lateral superior
frontal (_____ bone)
-the frontal bone is located at the _____ and _____ aspect of the cranium _____ to the _____ bones. it also forms the _____ of the _____ (_____)
1 forehead anterior superior anterior roof orbits eye sockets supraorbital margin superior border supraorbital notch foramen medial third supraorbital squamous part frontal sinus orbital squamous
temporal (_____ bones)
2 lateral inferior parietal weakest squamous part scale superior lateral zygomatic process anteriorly anteroinferior squamous zygomatic zygomatic arch mandibular fossa mandible condyloid process temporomandibular mastoid process breast-shaped inferiorly posterior mastoid external auditory meatus posterior mandibular fossa ear styloid process pencil anteromedial external auditory meatus inferiorly petrous portion wedge occipital sphenoid middle inner ear
sphenoid (_____ bone)
-the sphenoid bone forms the the _____ of the cranium _____ to the _____ and _____ bones; it also forms part of the _____ and _____ walls of the orbit
–the _____ are two broad _____ extensions from the body. the greater wing contains the openings including the _____ and _____. it also contains the _____ through which the _____ will pass
–the _____ are thin, _____ projections that extend into the _____ wall of the orbit and form the _____ aspect of the _____ of the body
1 cranial facial base anterior temporal occipital floor lateral cubical midline base anterior occipital sphenoid air sinuses sella turcica depression superior posterior dorsum sallae hypophyseal fossa greater wings lateral foramen rotundum foramen ovale foramen spinosum middle meningeal artery lesser wings triangular posterior anterior superior surface pterygoid process greater wing medial lateral pterygoid plate posteriorly pterygoid fossa lateral choanae
ethmoid (_____ bone)
–the thin _____ is perpendicular to and extends _____ from the _____ to form the _____ aspect of the _____
–the _____ (_____) is the free, convoluted _____ margin of the medial plate of the _____
–the _____ (_____) is the part of the lateral mass _____ to the middle nasal concha. this is difficult to see from an anterior view of the skull
1 sievelike anterior orbits cribriform plate horizontal anterior nerve fibers crista galli perpendicular plate inferiorly cribriform plate superior nasal septum lateral mass ethmoid ethmoid sinuses orbit middle nasal concha (turbinate) inferior lateral mass superior nasal concha (turbinate) superior
facial bones
-_____ bones make up the skeleton of the face
14
maxilla (_____ bones)
-from latin maxilla = jaw bone
the maxilla forms the _____ jaw
2 upper pyramidal air sinus maxillary sinus alveolar process inferior teeth upper jaw palatine process medially contralateral hard palate infraorbital foramen anterior inferior infraorbital margin
mandible (_____ bone)
1 lower horseshoe body rami ramus perpendicular superiorly posterior body alveolar process superior teeth lower mental foramen inferior premolar tooth angle ramus condyloid process (head) superior mandibular fossa neck ramus head coronoid process superior mandibular foramen medial
zygomatic (_____) (_____ bones)
cheek bone 2 zygomatic arch temporal lateral floor orbit
nasal (_____ bones)
2 nose two anterior superior bridge inferior frontal
lacrimal (_____ bones)
2 tear ducts thin irregular anterior medial orbit
inferior nasal conchae (turbinate) (_____ bones)
2 shell horizontally lateral nasal wall hard palate
palatine (_____ bones)
2 posterior hard palate posterior maxilla
vomer (_____ bone)
1 vertical irregular median hard palate inferiorly sphenoid ethmoid superiorly