Fixed joints are formed by the skull bones.
The only bone in your skull that forms freely movable joints is your mandible
Suture joints are practically immovable joints. You can find them in case of skull. They are there in case of skull, probably to allow the growth of individual bone, in order to increase the size of skull. With out joints, it would be very difficult to increase the size of the skull.
An immovable joint. (sutures joining the bones of the skull)
Fibrous joint
The cranial bones are fused together at immovable joints known as sutures. The skull contains 22 bones of which 21 are fused together at these joints. The only skull bone that is capable of movement is the jaw bone.
There are not any muscles that are in the bones of the skull. The skull is made up of bones and joints which form before birth to create the shape of the skull.
Although there are many joints in the skull, most are fused or immovable. The only bone that is free moving is the mandible, the lower jaw. The joints that connect the tooth to the socket are gomphosis joints, which allow little to no movement.
Probably the best known suture joints are those that join the bone plates of the skull.
The joints between bones of the skull are immovable and called sutures.
joints,cartilage ang ligaments
All cranial bones are joined by sutures with some bones having Sharpey's fibres giving a degree of flexability to some joints but even these joints are still sutures. The part of the skull that is not sutured is the mandible (the jaw) but then this structure is not actually a part of the cranium. The cranium is the portion of the skull that contains the brain.
The skull is a bone. The skull protects the brain.