Final answer:
Fibrous joints include sutures and gomphoses, holding bones together with fibrous connective tissue. Sutures are in the skull, while gomphoses connect teeth and sockets.
Step-by-step explanation:
The class of joints that includes sutures and gomphoses is fibrous joints. Fibrous joints are held together by fibrous connective tissue and do not have a cavity between the bones. Sutures are fibrous joints found only in the skull and hold the skull bones tightly in place. Gomphoses are fibrous joints between the teeth and their sockets. The teeth are connected to the sockets by a periodontal ligament, which holds them firmly in place.