Which term describes joints that connect two bones but allow no movement?

The term that best describes joints that connect two bones but allow no movement is suture. Sutures are specific types of fibrous joints found primarily in the skull, where they firmly connect the bones along a zigzag line. These joints are designed to be immovable, providing stability and protection for the brain. The edges of the bones are interlocked and held together by dense connective tissue, forming a strong union that does not permit movement, which is essential for maintaining the shape and integrity of the skull.

In contrast, cartilaginous joints allow for limited movement due to the presence of cartilage between the bones, while synovial joints are characterized by a fluid-filled joint cavity that permits a wide range of motion. Amphiarthrosis refers to joints that allow slight movement, which also distinguishes it from the completely immovable nature of sutures.