basión
71Cribriform plate — Bone: Cribriform plate Ethmoid bone from above. Latin lamina cribrosa ossis ethmoidalis Gray s …
72Mastoid antrum — Bone: Mastoid antrum Coronal section of right temporal bone. ( Tympanic antrum labeled at upper left.) …
73Crista galli — Bone: Crista galli Ethmoid bone from above …
74Orbital part of frontal bone — Frontal bone. Outer surface. (The Pars orbitalis is the bottom third.) F …
75Ethmoid sinus — Bone: Ethmoid sinus Paranasal sinuses …
76Medial pterygoid plate — Bone: Medial pterygoid plate Sphenoid bone. Anterior and inferior surfaces. (Medial pterygoid plate labeled at bottom left.) …
77Nuchal lines — Bone: Nuchal lines Occipital bone. Outer surface …
78Optic canal — Bone: Optic foramen 1: Foramen ethmoidale 2: Canalis opticus 3: Fissura orbitalis superior 4: Fossa sacci lacrimalis 5: Sulcus infraorbitalis 6: Fissura orbitalis inferior 7: Foramen infraorbitale …
79Middle nasal concha — Bone: Middle nasal concha Ethmoid bone from behind …
80Mastoid part of the temporal bone — Bone: Mastoid portion of the temporal bone Side view of head, showing surface relations of bones …