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AXIAL SKELETON

cranial and facial bones

QuestionAnswer
Bone Projections for Muscle and Ligament Attachment; raised area on or above a condyle Epicondyle
Projections That Help to Form Joints condyle, ramus, facet, head
armlike bar of bone ramus
rounded articular projection condyle
smooth nearly flat articular surface facet
bony expansion carried on a narrow neck head
depressions and openings allowing blood vessels and nerves to pass meatus, sinus, fossa, groove, fissure, foramen
canal like passageway meatus
cavity within a bone filled with air and lined with mucous membrane sinus
furrow groove
narrow slitlike opening fissure
round or oval opening through a bone foramen
formed by the cranium and facial bones skull
protects the brain and is the site of attachment for head and neck muscles cranium
calvaria (superior, lateral, posterior, and forhead region) vault
8 cranial bones 2 parietal, 2 temporal, frontal, occipital, sphenoid, ethmoid
forms forhead, superior part of orbits and anterior cranial fossa, contains sinuses frontal bone
articulates posteriorly with parietal bones via the coronal suture frontal bone
major markings include supraorbital margins with a supraorbital foramen (contains supraorbital nerve and artery which supply the forhead. internally contributes to the anterior cranial fossa frontal bone
makes up bulk of cranial vault parietal bone
articulation b/w parietal and frontal coronal suture
right and left parietal bones meet sagittal suture
parietal bone meets the occipital bone posteriorly lambdoid suture
parietal and temporal bones meet squamosal suture
also known as wormian bones sutural bones
forms most of the skull's posterior wall and most of the posterior base of the skull occipital bone
major markings include occipital condyles (articulates with the first vertebrae) occipital bone
bony protuberances which serve as sites of muscle attachment nuchal line
major markings include foramen magnum, and hypoglossal canal occipital bone
opening for spinal cord to join with brain foramen magnum
forms hard palate maxilla and palatine bone
lie inferior to parietal bones, form the inferolateral portion of the skull temporal bone
specific regions include squamous, temporal, petrous, and mastoid regions temporal bone
major markings include zygomatic process, styloid process, external acoustic meatus, stylomastoid foramen, carotid canal, mastoid process and mandibular fossa temporal bone
external acoustic meatus located in temporal
carotoid canal located in temporal
mandibular fossa located in temporal
houses stylomastoid foramen temporal
zygomatic process located in temporal
major openings for jugular foramen, and internal acoustic meatus temporal
________ process can be felt just posterior to the ear mastoid
full of sinuses and site for ear infection; possible meningitis mastoid region
point where mandible joins cranium mandibular fossa
forms the central wedge and articulates with all other cranial bones sphenoid
major markings include sella turcica, hypophyseal fossa sphenoid
major openings include foramina rotundum, foramina ovale, optic canal, and superior orbital fissures sphenoid
optic canal located in sphenoid bone
forms part of eye orbit sphenoid
openings in teh bases of the lesser wing for optic nerve to enter orbits; the foramina are connected by the chiasmatic groove optic foramen
form part of nasal turbinates pterygoid processes
lies b/w sphenoid and nasal bones ethmoid
forms most of the bony area b/w nasal cavity and orbits ethmoid
attachment for dura mater crista galli
olfactory fibers pass from nasal mucosa to brain cribriform plate
major markings include cribiform plate, crista galli, and perpendicular plate, and ethmoid sinuses ethmoid bone
forms superior nasal septum perpendicular plate
paired facial bones maxillae, zygomatics, nasals, lacrimals, palatines, inferior conchae.
single facial bones mandible and vomer
houses tear ducts lacrimal bone
lower jawbone; strongest and largest facial bone mandible
major markigns include coronoid process, mandibular condyle, alveolar margin, mental foramina and mandibular mandible
articulation of mandible with mandibular fossa of temporal bone mandibular condyle
dentist use this opening for anesthesia mandibular foramen
medially fused bones that make up the upper jaw and central portion of facial skeleton maxillary bones
facial keystone bone taht articulates wiht all other facial bones except mandible maxilary bone
major markings include palatine, frontal, and zygomatic processes, the alveolar margins, inferior orbital fissure, and maxillary sinuses maxillary bone
inferior margin for teeth sockets alveolar margin
project medially from the alveolar margins to form the anterior region of the hard palate palatine processes
forms part of nasal septum and lateral walls and roof of nasal cavity maxillary bone
forms cheekbones zygomatic bones
thin medially fused bones that form the bridge of the nose nasal bone
contributes to the medial walls of orbit and contain a deep groove called lacrimal fossa that houses the lacrimal sac lacrimal bones
two bone plates that form portions of the hard palate, posterolateral walls of the nasal cavity, and small part of orbits palatine bones
results from left and right halves of the palate to fuse medially during fatal development cleft palate
bony cavities in which the eyes are firmly encased and cushioned by fatty tissue orbits
formed by parts of 7 bones: frontal, sphenoid, zygomatic, maxilla, palatine, lacrimal and ethmoid orbits
lesser wing of sphenoid and orbital plate of frontal bone form the ____ of orbit roof of orbit
zygomatic process of frontal bone greater wing of sphenoid bone orbital surface of zygomatic bone form the _____ wall of orbit lateral wall orbit
palatine bone and maxillary bone and zygomatic bone form the _______ of orbit floor of orbit
sphenoid, ethmoid, maxilla, and lacrimal bones form the _____ wall of orbit medial wall orbit.
constructed of bone and hyaline cartilage nasal cavity
formed by cribriform plate of ethmoid Hint: nasal cavity roof of nasal cavity
superior and middle conchae of ethmoid, perpendicular plate of palatine, and inferior nasal conchae form the ________ of nasal cavity lateral wall
formed by palatine process of maxillae and palatine bone floor of nasal cavity
5 paranasal sinuses are frontal, sphenoid, ethmoid, and paired maxillary bones
no direct articulation with any other bone, lies inferior to the mandible, acts as a movable base for tongue hyoid bone
Created by: hjp501
 

 



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