Parietal bones


 Parietal bones


     Parietal bones of both sides make most of portion of the vault of the skull. The internal surface is made canaliculated by the brain and blood ducts. Besides it, the mark of coils can be seen on the layer of the brain. There are membranous vacant place on the angle of lateral bones which are called frontalles.

     Both lateral bones are very large. These both bones are attached   to each other by the sagittal suture on the middle line; on the front side these are attached   to the frontal bone by the coronal suture; on the back side these are attached to the occipital bone by the lambdoidal suture and on the below side these bones are attached to the temporal bones by the squamous sutures.