skull Flashcards
airstream pathways
oropharyngeal isthmus (OPI), velopharyngeal port (VPP)
skull has __ bones
22
2 types of bones of skull
(Neuro)cranial bones (8)
Viscerocranial/facial bones (14)
(Neuro)cranial bones (8)
temporal (one pair), parietal (one pair), frontal, occipital, sphenoid, ethmoid
Viscerocranial/facial bones (14)
mandible, maxilla, palatine, zygomatic, lacrimal, nasal, inferior nasal concha, vomer
(all except mandible and vomer have one pair)
temporal bones (location, composition)
-sides & base of skull; hardest bones in body
-Squamous Part, Mastoid Part, Petrous Part
Squamous part of temporal bone
flat, thin portion that forms anterior and superior sections, contributing to the zygomatic arch
Mastoid part of temporal bone
contains the mastoid process, important for muscle attachment
Petrous part of temporal bone
dense, pyramidal-shaped section; houses inner ear structures
Parietal bones (location, structure, Sutures (squiggly jigglies))
-sides & roof of cranial cavity
-broad, curved plates
-Sagittal Suture, Coronal S., Lambdoid S., Squamosal S.
Sagittal Suture
where two parietal bones meet along midline of skull
Coronal Suture
where the parietal bones meet the frontal bone anteriorly
Lambdoid Suture
where parietal bones meet the occipital bone posteriorly
Squamosal Suture
where parietal bones articulate with the temporal bones laterally
Frontal bone (location, structure, sutures)
-forms the forehead & upper part of the orbital cavity (eye sockets)
-single bone that includes forehead, roofs of the orbits, most of anterior cranial floor; sinuses (frontal sinuses)
-articulates with the parietal bones at coronal suture
Occipital bone (location, structure, sutures)
-forms posterior and inferior parts of cranial cavity
-single bone includes back of skull & base of skull around the “foramen magnum” (hole where spinal cord exits skull)
-articulates with parietal bones at lambdoid suture
foramen magnum
hole in the occipital bone where spine exits skull
Sphenoid bone (location, structure, sutures)
-base of skull in between temporal and frontal bone (anterior to occipital)
-butterfly shaped bone that forms floor of cranial cavity; forms part of sinus
-articulates with all other cranial bones
Ethmoid bone (location, structure, sutures)
-roof of nasal cavity & base of cranium
-between orbital cavities, forms part of nasal septum & lateral walls & roof of nasal cavity; contains numerous air cells that form ethmoidal sinuses
-articulates with frontal bone anteriorly & sphenoid bone posteriorly
Maxilla Bones (location, structure)
-upper jaw & parts of orbit, nasal cavities, hard palate
-paired bones fused at midline, contains upper teeth (floor of orbital cavities, roof of mouth; contributes to formation of nasal cavity & paranasal sinuses)
Mandible bone (location, structure)
-lower jawbone, only moveable bone of skull
-largest & strongest bone in face, holds lower teeth
Zygomatic bones (location, structure)
-cheekbone
-connects with maxilla, temporal bone, sphenoid bone, frontal bone; forms part of orbit (supports eye)
nasal bone (location, structure)
forms bridge of nose; small paired rectangular bones that form upper part of nasal septum; shape and support to nose
lacrimal bone (location, structure)
smallest, most fragile bone of face; small thin bones forming part of the medial wall of each orbit
-right inside the eye socket area near nasal bone
-contains lacrimal fossa that houses lacrimal sac; integral to tear drainage system
palatine bone (location, structure)
back part of nasal cavity & roof of mouth (behind the maxilla)
-L-shaped, contributes to formation of hard palate, nasal cavity, & sinus
Vomer bone (location, structure)
forms part of the nasal septum; located in midline of the nasal cavity
-thin, plowshare-shaped bone that divides nasal cavity into left and right nostrils (in between L & R palatine bones)
inferior nasal conchae (location, structure)
project from the lateral walls of nasal cavity
-paired curved bones that form part of the lateral walls of the nasal cavity
facial bones: My mouth’s palate never liked zuchinni in vinegar
mandible-maxilla-palatine-nasal-lacrimal-zygomatic-inferior-vomer
which two bones form the hard palate?
maxilla and palatine bones
