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kmganatomy
axial skeleton
| Question | Answer |
|---|---|
| 206 bones | 80-axial 126-appendicular |
| parietal | (2) form superior and lateral parts of the skull |
| coronal suture | runs in the coronal plane |
| squamous suture | each parietal bone meets a temporal bone inferiorly |
| sagittal suture | where right and left parietal bones meet superiorly |
| lambdoid suture | parietal bone meet the occipital bone posteriorly |
| temporal bones | (2) lie inferior to the parietal bones |
| squamosal region | plate shaped region that abuts the squamous suture |
| zygomatic process | bar like projection that projects anteriorly to meet the zygomatic bone |
| tympanic region | surrouns the external auditory meatus |
| external auditory meatus | external ear canal where sound enters |
| styloid process | projects inferiorly from the tympanic region |
| mastoid region | breast shaped region located posterior to the tympanic region |
| mastoid process | projection located in the mastoid region |
| mastoid air cells | air sinuses which lie just posterior to middle ear cavity |
| petrous region | projects medially and contributes to cranial base |
| carotid canal | internal carotid artery passes through this opening |
| jugular foreman | internal jugular vein passes through this opening |
| frontal bone | forms forehead and roofs the orbits |
| supraorbital margin | su[erior margin of each orbit |
| superciliary arches | lies deep to our eyebrows |
| glabella | smooth part of frontal bone between the superciliary arches |
| frontal eminences | 2 rounded prominences one on each side of frontal bone |
| frontal sinuses | lateral to glabella, contains air-filled sinuses |
| occipital condyles | articulate with first vertebra and enable us to nod our heads 'yes' |
| foramen magnum | inferior part of brain connects with spinal cord |
| external occipital protuberance | external surface of occipital bone |
| sella turcica | saddle-shaped prominence on superior surface of body |
| sphenoidal sinuses | with in the sphenoid body are the paired sinuses |
| ethmoid bone | lies between nasal and sphenoid bones |
| cribriform plate | superior surface of the ethmoid bone |
| perpendicular plate | inferiorly in the median plane |
| ethmoid sinuses | part of the paranasal sinuses |
| superior and middle nasal conchae | medially from the lateral masses and protrude into nasal cavity |
| ear ossicles | bones of the ear |
| malleus | hammer |
| incus | anvil |
| stapes | sturrup of saddle |
| mandible | lower jaw bone |
| horizontal body of the mandible | 2 upright rami |
| mandibular angle | angle formed by function of inferior edge of body and the posterior edge of ramus |
| alveolar process | superior border or body of the mandible |
| mental protuberance | tip of chin |
| maxillary sinuses | largest paranasal sinuses |
| alveolar process (inferior) | inferior margin of the maxillary bones; the tooth sockets, called alveoli, open into this margin |
| palatine process | projects medially from the alveolar process to form the anterior region of the hard palate |
| zygomatic bones | form lateral walls of orbits |
| nasal bones | form bridge of nose |
| lacrimal bones | losdcated in the medial orbital walls |
| palatine bones | complete the posterior part of the hard palate |
| vomer | forms the inferior part of the nasal septum |
| inferior nasal conchae | thin, curved bones that project medially to form the lateral walls of nasal cavity |
| hyoid bone | has no direct articulation with any other bone |
| cervical vertebrae | 7 of the neck region; C1-C7; concave |
| thoracic vertebrae | 12 of thoracic; T1-T12; convex |
| lumbar vertebrae | 5 in lower back; L1-L5; concave |
| sacrum | inferior to lumbar and superior tot he coccyx (articulate with hips) |
| coccyx | most inferior region of the vertebral column |
| 4 curvatures | give vertebral column an S-shaped and increase the resilience of the spine |
| manubrium | superior section articulates with medial ends of clavicles |
| xiphoid process | inferior end of sternum |
| true ribs | (1-7) attach to sternum by costal cartilage |
| false ribs | (8-12) attach indirectly to sternum |
| floating ribs | (11-12)Do Not Attach to sternum |