What connects bone to bone in the body?

Ligaments are the connective tissues that link bones to other bones at a joint. They provide stability and support to the skeletal system by ensuring that bones remain firmly connected while allowing for the necessary range of motion at joints. The structure of ligaments consists of strong, fibrous tissues that are designed to withstand the stress and strains exerted during movements.

In contrast, tendons are responsible for connecting muscles to bones, facilitating movement when the muscles contract. Cartilage is another form of connective tissue, but it serves different functions, such as cushioning joints and supporting structures like the nose and ears, rather than connecting bone to bone. Muscles are the tissues that enable movement but do not connect bones to each other. Thus, the defining characteristic of ligaments as connectors between bones makes them the correct answer for this question.