Create an account
Skull, mandible, hyoid, vertebtal column, thoracic (rib) cage, sternum, sacrum, coccyx. Forms uprite axis of body and protects brain, spinal cord, vital organs in thoracic region
or cranium; Protects the brain, supports organs of vision, hearing smell, taste, and provides foundation for structures taht take air, food and water into body.
Superior View of Skull Bones
Contains 2 Parietal Bones, Frontal Bone, Saggital Suture and Corneal Suture; Parietal bones joined midline by Sagittal Suture and Parietal bones are connected to Frontal Bone by Corneal Suture
Posterior View of Skull
Parietal and Occipital bones, Lambdoid suture, Sutural Bones, External occipital protuberance, Ligamentum nuchae, Nuchal lines
External Occipital Protuberance
on occipital bone and can be felt through scalp at base of head; site of attachment for Ligamentum Nuchae which helps keep head erect
elastic ligament that extend down neck and helps keep head erect by pulling on occipital region of skull; attaches to external occipital protuberance
Lateral View of Skull
Parietal bones, Squamous part of temporal bone, Squamous suture, Temperal Bone, Greater wing of sphenoid, Zygomatic bones, Maxilla, Mandible
has External auditory meatus, Mastoid process, Temporal lines, Zygomatic process of Zygomatic arch
External Auditory Meatus (Canal)
prominent feature of temporal bone - large hole surrounded by external ear
posterior and inferior to auditory canal - large inferior proection. Can be seen and felt as a prominent lump just posterior to the ear. Not solid bone and filled w/mastoid air cells which are connected to inner ear.
superior and inferior lines - attachment points of temporalis muscles, on of major muscles of mastication, arch across lateral surface of parietal bone
Greater Wing of Sphenoid
bone immediately anterior to the temporal bone - appears to be 2 bones, one on each side of skull, is actually single bone extending across skull
or cheekbone which can be easily seen and felt on face; anterior to sphenoid bone - has temporal process of the zygomatic arch
consists of joined processes from temporal and zygomatic bones, forms bridge across side of skull. Easily felt on side of face, muscles on each side of arch can be felt as mandible opens and closes
lower jaw; inferior to maxilla and atriculates w/the temporal bone. consists of 2 main portions: body (extends anteroposteriorly) and ramus (extends superiorly from body toward temperal) w/condyle and coronoid processes
(branch); extend superiorly from body towards temporal. Superior end has condyle and coronoid process
Alveolar Process of Maxilla and Manible
of maxilla - contains superior (upper) teeth
of mandible - contains inferior (lower) teeth
Anterior View of Skull
Major structures are frontal bone (forehead), zygomatic bones (cheekbones), maxillae, and mandible. Maxilla and mandible bear teeth. Contain Orbits and Nasal cavities
Orbits of Skull
Cone-shaped fossae w/their apices oriented posteriorly. Provides protection for eyes and attachement points for muscles that move eyes. Contains Nasolacrimal canal and Optic canal
nasolacrimal ducts passes through from orbit into the nasal cavity, carrying tears from eyes to nasal cavity
optic nerve for vision passes from eye through canal at posterior apex of orbit and enters cranial cavity
Bones of Nasal Cavity
Nasal cavity, Nasal septum (vomer, perpendicular plate of ethmoid), Nasal conchae (inferior, middle and supior)
divides nasal cavity into right and left halves; bony part is vomer and perpendicular plate of ethmoid, Hyaline cartialge anterior part
3 bony shelves that form lateral walls of nasal cavity; inferior nasal concha is seperate bone, and middle and superior nasal conchae are projections from ethmoid bone. increases surface of nasal cavity to faciliate moistening, removal of particles and warming of air inhaled
large cavities within several bones of nasal cavity, Functions: decrease skull weight and act as resonating chambers, Named for bone in which they are found (frontal, maxillary, ethmoidal, sphenoidal)
Paranasal Sinuses Names
Named for bones in which they are found: Frontal, Maxillary, Ethmoidal, Sphenoidal
composed of bones, cartilages, joints and ligaments; accounts for 20% of your body mass.
the large cranial bone forming the front part of the cranium: the forehead and the upper part of the orbits
Mark the superior limits of the orbits, the bony recesses that support and protect the eyeballs
posterior cranial fossa
fossa primarily formed by the occipital bone, with contributions from the temporal and parietal bones
Markings on the base of the Occipital Bone where the skull sits on the 1st vertebrae (atlas) of the neck
opening medial and superior to the occipital condyle through which the cranial nerve passes (XII)
the slender arch formed by the temporal process of the cheekbone that bridges to the zygomatic process of the temporal bone
small, bony ring surrounding the entrance to the external acoustic meatus of temporal bone
middle cranial fossa
formed by part of the sphenoid bone and the temporal bone, supports the temporal lobes of the brain
This foramen has one vessel and three nerves passing through it. It is found along the suture between the temporal and occipital bones.
anterior ofthe jugular foramen, transmits the internal carotid artery into the cranial cavity
jagged opening between the petrous temporal bone and the sphenoid providing passage for numerous small nerves
internal acoustic meatus
positioned superlateral to the jugular foramen transmits cranial nerves VII and VIII
process of the temporal bone behind the ear at the base of the skull, acts as an anchoring site for some neck muscles
extends from the base of the temporal bone, attachment point for several tongue and neck muscles
between the styloid and the mastoid processes, allows cranial nerve VII (facial nerve) to leave the skull
the bat-shaped bone that extends behind the eyes and forms part of the base of the skull
The Hypophyseal Fossa is "seat of the saddle" (Sella Turcica) part of the Sphenoid bone. It is the groove that is the deepest part of the body and it holds the Pituitary gland.
portions of the sphenoid seen exteriorly anterior to the temporal and forming a part of the eye orbits
vertical projections that begin at the boundary between the greater and lesser wings of the sphenoid; serve as sites for attachment of muscles that move the mandible and soft palate
superior orbital fissure
fissure between the greater and lesser wings of the sphenoid bone that transmits structures from the cranial cavity to the orbit
1st of three holes from anterior, situated laterally of the sella turcica, most anterior hole. Medial part of the the greater wing and usually oval
This foramen is found in the sphenoid bone on the middle fossa of the cranium. It is the first foramen that the mandibular nerve passes through as it leaves the cranium.
transmitts the middle meningeal artery which serves the internal faces of some cranial bones
form, forms part of the posterior portion of the nose, the orbit, and the floor of the cranium
Found on each side of the crista galli and allows nerve fibers carrying nerve impulses from the olfactory receptors of the nose to reach the brain
inferior projection of the ethmoid that forms the superior part of the nasal septum
superior nasal conchae
thin, delicately coiled plates of bone extending medially from the lateral masses of the ethmoid into the nasal cavity
middle nasal conchae
higher projection, attached or connected to ethmoid bone. forms paired orbital plates with superior conchae
the anterior, non-articulating process of the ramus of the mandible which serves as the insertion for the temporalis muscle.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together