The<unk> , a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoid in shape and curved on itself. It is pierced by a large oval aperture, the foramen magnum, through which the cranial cavity communicates with the vertebral canal.
The curved, expanded plate behind the foramen magnum is named the squama<unk> is.
The thick, somewhat quadrilateral piece in front of the foramen is called the basilar part of<unk> .
On either side of the foramen are the lateral parts of<unk> .
Occipital bone
Sphenoid bone
Zygomatic bone
Frontal bone
Pisiform bone
Parietal bone
Mastoid process
Nasal bone