The skull AP1
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| The most complex part of the skeleton | skull
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| 22 bones joined together by sutures | skull
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| Number of cranial bones that surround the cranial cavity | 8
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| Number of facial bones support teeth, facial, and jaw muscles | 14
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| 2 types of bones in skull and number of each | 14 facial and 8 cranial
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| Only moveable facial bone | mandible
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| Name 4 paranasal sinuses | frontal, sphenoid, ethmoid, and maxillary
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| Lines mucous membrane and air-filled | paranasal sinuses
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| Lighten the anterior portion of skull | paranasal sinuses
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| Acts as chamber that adds resonance to the voice | paranasal sinuses
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| Lighten skull, provide resonance to the voice, assist in arming and humidifying the air that we breathe | paranasal sinuses
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| Largest paranasal sinus | maxillary
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| Cranial fossa consists of what two parts? | cranium and base
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| Protects the brain and associated sense organs | cranium
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| Consists of two parts: the calvaria and the cranial base | cranium
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| Two parts of cranium | calvaria and cranial base
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| Three basins of the Base of cranial fossa | anterior cranial fossa, middle cranial fossa, and posterior cranial fossa
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| Forms forehead and part of the roof of the cranium | frontal bone
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| Posterior boundary of frontal bone | coronal suture
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| Forms roof of the orbit | supraorbital margin
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| Provides passage for nerve, artery, and vein | supraorbital foramen
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| Smooth area above roof of the nose | glabella
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| Contains the frontal sinuses | glabella
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| Form most of cranial roof and part of its lateral walls | parietal bones
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| Bone bordered by 4 sutures | parietal bone
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| 4 sutures that border parietal bone | sagittal, coronal, lambdoid, and squamous
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| serves as attachments of the terporalis muscle of the parietal bone | two temporal lines
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| lateral wall and part of floor of cranial cavity | temporal bones
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| encircled by squamous suture | squamous part of temporal bones
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| rear and base of skull | occipital bone
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| foramen magnum holds what? | spinal cord
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| skull rests on ? | atlas
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| where does the skull articulate with the atlas? | Occipital condyles
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| largest foramen in skull | foramen magnum
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| hyaline cartilage -> bone | endochondral ossification
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| fetal skeleton is made of ? | hyaline cartilage
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| All bones inferior to skull EXCEPT WHAT undergo E.O.? | clavicles
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| Chondrocytes | mature cartilage cells
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| True or False? Chondrocytes undergo mitosis | true
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| Enlarge and calcify to form tribiculae | chondrocytes
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| Growth plate (in infants only) | epiphyseal plate
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| Where bones form joints with other bones; where tendons, ligaments, & muscles attach,; and where blood vessels and nerves have passed | sutures
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| Parts of the sphenoid bone | greater wing, lesser wing, and body
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| Contributes to medial wall of eye orbit; lateral walls and roof of nasal cavity and nasal septum; internal between eyes | ethmoid bone
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| Three major portions of the ethmoid bone | perpendicular plate, cribform plate, and labyrinth
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| Forms superior two-thirds of nasal septum (top) | perpendicular plate
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| Forms roof of nasal cavity (bottom) | cribform plate
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| Attachment point of meninges | crista galli
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| Large mass on each side of perpendicular plate | labyrinth
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| How many facial bones? | 14
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| Facial bones are made up of what bones? | 2 nasal bones, 2 maxillae, 2 zygomatic bones, 2 mandible, 2 lacrimal bones, 2 palatine bones, 2 inferior nasal conchae, and 1 vomer
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| Forms bridge of nose, supports cartilage that shape lower portions of nose and often fractured by a blow to the nose | nasal bone
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| Largest facial bone | maxillary
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| Forms upper jaw and meet each other at the median | maxillary bones
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| Boney points in between teeth | aveolar process
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| Socket that holds teeth | alveolus
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| Forms most of the hard palate | maxillary bones
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| Forms the roof of the mouth and floor of nasal cavity | palate
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| Larger in volume than frontal, sphenoid, and ethmoid sinuses | maxillary sinus
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| Forms angle of the cheekbones and part of the lateral orbital walls | zygomatic bones
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| Formed from temporal process of zygomatic bone and zygomatic process of temporal bone | zygomatic arch
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| Strongest bone of the skull | mandible
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| Only bone of skull that moves noticeably | mandible
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| Supports lower teeth | mandible
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| Provides attachments for muscles of facial expressions and mastication (chewing) | mandible
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| Median cartilaginous joint in the fetus | mental symphysis
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| Develops as two separate bones in fetus and ossifies in early childhood | mental symphysis
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| Point of chin | mental protuberance
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| Body of this bone supports teeth | mandible
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| Ramus of mandible articulates with ? | cranium
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| Where body and ramus meet | angle of mandible
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| Bears the mandibular condyle | condylar process
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| Oval knob that articulates with the mandibular fossa of the temporal bone forming the hinge temporomandibular joint | mandibular condyle
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| Process of insertion of temporalis muscle | coronoid process
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| Parts of mandible | condylar process, coronoid process, mandibular notch, and mandibular foramen
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| Forms part of the medial wall of each orbit | lacrimal bones
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| Smallest bone of skull | lacrimal bones
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| Houses lacrimal sac in life | lacrimal fossa
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| Tears collect HERE and drain into nasal cavity | lacrimal sac
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| L-shaped bones | palatine bones
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| Forms the posterior portion of the hard palate (part of the lateral nasal cavity wall and part of the orbital floor) | palatine bones
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| Largest of the three conchae in the nasal cavity | inferior nasal conchae
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| Superior and middle conchae are part of the ____ | ethmoid bone
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| Inferior half of the nasal septum | vomer
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| Superior half formed by perpendicular plate of ethmoid | vomer
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| Supports cartilage that forms the anterior part of the nasal septum | vomer
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| 7 bones of eye orbit | ethmoid, palatine, frontal , sphenoid bone, mailla, zygomatic bone, lacrimal bone
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| Only unarticulated bone | hyoid bone
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| Three bones in each middle ear (auditory ossicles) | malleus (hammer), incus (anvil), stapes (stirrup)
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| Smallest bone of ear | stapes
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| Slender u-shaped bone between the chin and larynx | hyoid
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| What bone signals evidence of strangulation if fractured? | hyoid
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| Space between unfused bones | fontanels
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| Filled with fibrous membrane; allows shifting of bones during birth and growth of brain | fontanels
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| 6 fontanels in infant skull | anterior, posterior, 2 sphenoid, and 2 mastoidal
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| Two frontal bones fuse by age 6 causing what suture? | metopic suture
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| What age does the skull reach adult size? | 8 or 9 years of age
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Created by:
Lisa Hall
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