The articular disk of the jaw is primarily composed of which type of tissue?

The articular disk of the jaw is primarily composed of dense fibrous connective tissue, which is key to its structure and function. This type of tissue provides the necessary strength and resistance to mechanical stress within the temporomandibular joint (TMJ). The dense fibrous connective tissue allows the disk to withstand the forces generated during activities such as chewing and speaking.

This tissue type also exhibits a certain amount of flexibility and compliance, enabling the articular disk to assist in load distribution across the joint surfaces. The composition of the disk, particularly its collagen fibers, ensures that it has the durability needed to support joint movement while helping to maintain the integrity of the joint.

The other options, such as elastic tissue and muscle tissue, do not accurately reflect the composition of the articular disk. Elastic tissue, while flexible, lacks the strength required for this particular function. Muscle tissue is involved in movement but is not present in the makeup of the articular disk itself. Cartilaginous tissue, though it might seem similar, does not accurately represent the fibrous structure that is characteristic of the articular disk composition.