Final answer:
Fibrous joints, classified into sutures, syndesmoses, and gomphoses, are held together by fibrous connective tissue without a joint cavity. Sutures are immovable joints in the skull, syndesmoses allow limited movement such as in the ankle, and gomphoses are peg-in-hole joints found between teeth and their sockets.
Step-by-step explanation:
Classification of Fibrous Joints
The structural classification of joints divides them into distinct types based on the tissue that connects bones at the joint. The three types of fibrous joints are sutures, syndesmoses, and gomphoses.
Sutures
Sutures are found exclusively in the skull and are immovable joints held together by short fibers of connective tissue. These fibers rigidly connect the skull bones, such as the sutures between the parietal bones and the frontal bone.
Syndesmoses
Syndesmoses are joints where bones are connected by longer bands of connective tissue, allowing for more movement than sutures. An example is the distal tibiofibular joint at the ankle.
Gomphoses
Gomphoses are a type of fibrous joint that occurs between teeth and their sockets. The tooth is anchored into the socket by the periodontal ligament, resembling a peg in a hole.