EVERYDAY SCIENCE

Detailed explanation-1: -(1) Sutures are nonmoving joints that connect bones of the skull. These joints have serrated edges that lock together with fibers of connective tissue.

Detailed explanation-2: -There are three types of immovable joints: sutures, syndesmosis, and gomphosis. Sutures: These narrow fibrous joints connect bones of the skull (excluding the jaw bone). In adults, the bones are held tightly together to protect the brain and help shape the face.

Detailed explanation-3: -The skull is made up mostly of immovable joints due to which skull bones cannot move except for the lower jaw. The lower jaw is connected to the other bones via movable joints which makes its movement possible.

Detailed explanation-4: -There are only two areas on the skull where synovial joints are present. The first is a pair of joints; the temporomandibular joints, where the mandible articulates with the skull on either side. The second synovial joint is the atlanto-occipital joint, where the base of the skull articulates with the vertebral column.

Detailed explanation-5: –The sutures present in the skull bones are the fibrous joints that surround and protect the brain.-The bones present in fibrous joints are held together by fibrous connective tissue. There is no cavity, or space, between the bones, that’s why this joint is immovable.