Which structure attaches bone to bone?

The correct answer is ligaments because they are fibrous connective tissues that connect one bone to another, providing stability and support to joints. Ligaments play a crucial role in maintaining the integrity of the musculoskeletal system, helping to prevent excessive movement that could lead to injury. For example, ligaments around the knee joint, such as the anterior cruciate ligament (ACL), help to secure the femur to the tibia, allowing for controlled movement while preventing dislocation.

In contrast, tendons connect muscles to bones, enabling movement. Cartilage, on the other hand, provides cushioning and support between bones at joints but does not connect bones directly to one another. Muscle fibers are involved in contraction and movement but do not perform the function of connecting bone to bone. This distinction is important for understanding the roles of different anatomical structures in the body.