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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 |