Its middle part or body is somewhat thick, and from it proceed upward two flattened portions, or wings, and downward two narrower and more slender projections (pterygoid processes).
1 Foramen Magnum. 2 Styloid Process of Occiput. 3 External Auditory Process. 4 Styloid Process of Petrous Temporal Bone. 5 Sphenoid Bone. 6 Pterygoid Process. 7 Superior Maxillary Bone. 8 Palatine Bone. 9 Molar Teeth. I0 Palatine Process of Superior Maxillary Bone. 11 Premaxillary Bone. 12 Incisor Teeth. 13 Foramen Incissivum. 14 Palato-maxillary Foramen. 15 Vomer. 16 Ethmoid Bone. 17 Temporal Condyle. 18 Foramen Lacerum Basis Cranii. 19 Basilar Process of Occiput. 20 Petrous Temporal Bone. 21 Occipital Condyle.