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| 31. | cranium | skull |
| 32. | cribriform plate | small, flattened areas with numerous small openings, located to either side of the midline in the floor of the anterior cranial fossa; formed by the ethmoid bone |
| 33. | crista galli | small upward projection located at the midline in the floor of the anterior cranial fossa; formed by the ethmoid bone |
| 34. | dens | bony projection (odontoid process) that extends upward from the body of the C2 (axis) vertebra |
| 35. | ear ossicles | three small bones located in the middle ear cavity that serve to transmit sound vibrations to the inner ear |
| 36. | ethmoid air cell | one of several small, air-filled spaces located within the lateral sides of the ethmoid bone, between the orbit and upper nasal cavity |
| 37. | ethmoid bone | unpaired bone that forms the roof and upper, lateral walls of the nasal cavity, portions of the floor of the anterior cranial fossa and medial wall of orbit, and the upper portion of the nasal septum |
| 38. | external acoustic meatus | ear canal opening located on the lateral side of the skull |
| 39. | external occipital protuberance | small bump located at the midline on the posterior skull |
| 40. | facet | small, flattened area on a bone for an articulation (joint) with another bone, or for muscle attachment |
| 41. | facial bones | fourteen bones that support the facial structures and form the upper and lower jaws and the hard palate |
| 42. | false ribs | vertebrochondral ribs 812 whose costal cartilage either attaches indirectly to the sternum via the costal cartilage of the next higher rib or does not attach to the sternum at all |
| 43. | floating ribs | vertebral ribs 1112 that do not attach to the sternum or to the costal cartilage of another rib |
| 44. | fontanelle | expanded area of fibrous connective tissue that separates the brain case bones of the skull prior to birth and during the first year after birth |
| 45. | foramen lacerum | irregular opening in the base of the skull, located inferior to the exit of carotid canal |
| 46. | foramen magnum | large opening in the occipital bone of the skull through which the spinal cord emerges and the vertebral arteries enter the cranium |
| 47. | foramen ovale of the middle cranial fossa | oval-shaped opening in the floor of the middle cranial fossa |
| 48. | foramen rotundum | round opening in the floor of the middle cranial fossa, located between the superior orbital fissure and foramen ovale |
| 49. | foramen spinosum | small opening in the floor of the middle cranial fossa, located lateral to the foramen ovale |
| 50. | frontal bone | unpaired bone that forms forehead, roof of orbit, and floor of anterior cranial fossa |
| 51. | frontal sinus | air-filled space within the frontal bone; most anterior of the paranasal sinuses |
| 52. | glabella | slight depression of frontal bone, located at the midline between the eyebrows |
| 53. | greater wings of sphenoid bone | lateral projections of the sphenoid bone that form the anterior wall of the middle cranial fossa and an area of the lateral skull |
| 54. | hard palate | bony structure that forms the roof of the mouth and floor of the nasal cavity, formed by the palatine process of the maxillary bones and the horizontal plate of the palatine bones |
| 55. | head of the rib | posterior end of a rib that articulates with the bodies of thoracic vertebrae |
| 56. | horizontal plate | medial extension from the palatine bone that forms the posterior quarter of the hard palate |
| 57. | hyoid bone | small, U-shaped bone located in upper neck that does not contact any other bone |
| 58. | hypoglossal canal | paired openings that pass anteriorly from the anterior-lateral margins of the foramen magnum deep to the occipital condyles |
| 59. | hypophyseal (pituitary) fossa | shallow depression on top of the sella turcica that houses the pituitary (hypophyseal) gland |
| 60. | inferior articular process | bony process that extends downward from the vertebral arch of a vertebra that articulates with the superior articular process of the next lower vertebra |
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