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