Final answer:
In inarticulates, valves are held together by fibrous connective tissue and ligaments. In articulates, the valves are held together by interosseous membrane and fibrous connective tissue.
Step-by-step explanation:
In inarticulates, the valves are held together by fibrous connective tissue and ligaments. These structures provide strength and support to the joint, anchoring the valves and preventing their separation.
In articulates, the valves are held together by interosseous membrane and fibrous connective tissue. The interosseous membrane is a strong band of connective tissue that unites the bones and provides stability to the joint.