The occipital bone surrounds the navel. It contains a hole called the foramen magnum. The occipital bone consists of a shell part, 2 lateral parts and an occipital part. It connects the carotid with the atlas.
4. Temporal Bones: Two temporal bones exist on either side of the carotid. Each bone consists of four parts. squama, petromastoid, tympanic and styloid processes. In this bone the hearing organ, auditory canal, carotid canal and facial nerve canal are located.