| A | B |
|---|
| Carotid Canal | A bony canal which allows the internal carotid artery to enter the interior of the skull |
| Cribriform Plate of the Ethmoid Bone | A delicate plate of bone which forms the roof of the nasal cavity; it is perforated by olfactory nerve fibers |
| Ethmoid Sinuses | One of the paranasal sinuses, which connect with the nasal cavity; are delicate, air-filled spaces which can be seen through the medial walls of the orbit |
| External Occipital Crest | A midline ridge on the exterior of the occipital bone; provides attachment for the ligamentum nuchae, a connective tissue membrane that separates the postvertebral muscles of each side |
| Foramen Lacerum | A jagged-edged opening in the skull base between the petrous temporal, sphenoid, and occipital bones; typically filled with cartilage |
| Foramen Ovale | A smooth-edged, oval-shaped opening in the skull base; transmits the mandibular division of the trigeminal nerve |
| Foramen Spinosum | A small opening in the skull base adjacent to the spinous process of the sphenoid; it transmits the middle meningeal vessels |
| Incisive Foramen | An opening at the front of the hard palate; transmits the nasopalatine nerve to supply sensation to the roof of the mouth |
| Inferior Nuchal Line | A line on the occipital bone marking the attachment of the fascia enclosing postvertebral muscles |
| Juglar Foramen | An irregular opening in the skull base which transmits the internal jugular vein, the glossopharangeal, vagal, and accessory nerves |
| Lateral Pterygoid Plate | One of two vertical plates projecting from the sphenoid bone; provides attachment for the lateral and medial pterygoid muscles |
| Mandibular Fossa | The fossa on the inferior aspect of the temporal bone for articulation with the head of the mandible |
| Maxillary Sinus | One of the paranasal sinuses; makes up the bulk of the volume of the maxilla |
| Occipital Bone | The large bone on the underside of the skull; provides attachment for the postvertebral muscles of the neck and bears occipital condyles for articulation with the atlas |
| Occipital Condyle | Paired elevation on the inferior surface of the occipital bone for articulation with the atlas |
| Palatine Bone | An "L-shaped" bone which contributes to the posterior hard palate and the lateral wall of the nasal cavity |
| Palatine Process (maxilla) | The horizontal process of the maxilla which forms the anterior part of the hard palate |
| Paranasal Sinuses | A group of air-filled spaces within the skull which are connected with the nasal cavity; there are four types: frontal, maxillary, sphenoid, ethmoidal |
| Posterior Nasal Aperture | The posterior openings of the bony nasal cavities are bounded by the perpendicular and horizontal plates of the palatine bone, the vomer, and the body of the sphenoid |
| Sphenoid Bone | A large central bone of the skull base. It has a body with the sphenoid sinus and a hollow for the pituitary gland above, and two wings (the greater and the lesser) that extend to each side |
| Sphenoidal Sinus | One of the paranasal sinuses, which connect with the nasal cavity. It is found in the center of the skull within the body of the sphenoid and lies inferior to the pituitary fossa. |
| Styloid Process | An elongated spine projecting inferiorly from the temporal bone. It provides attachment for several muscles. |
| Superior Nuchal Line | A line on the occipital bone marking the attachment of the fascia enclosing the postvertebral muscles. |
| Temporal Bone | This bone has squamous, tympanic, styloid, mastoid, and petrous parts. |
| Tympanic Plate | The part of the temporal bone forming the anterior wall and floor of the external auditory meatus. |
| Vomer | A midline bone forming the posterior and inferior nasal septum. |
| Zygomatic Arch | An arch formed by the junction of the zygomatic process of the temporal bone with the zygomatic bone itself. |
| Zygomatic Bone | The bone of the upper lateral cheek; articulates with the maxilla, temporal, and frontal bones. |
