What structure attaches bone to bone?

The structure that attaches bone to bone is a ligament. Ligaments are made up of dense connective tissue, which provides strength and stability to joints by connecting the ends of bones together. This connection allows for a certain range of motion while also supporting the joint and preventing excessive movement that could lead to injury.

Tendons, while related to skeletal structures, serve a different purpose; they connect muscles to bones, enabling movement when muscles contract. Cartilage is a smooth, flexible connective tissue that cushions joints and helps with smooth movement, but it does not directly attach bones to each other. Fascia is a connective tissue that surrounds muscles and organs, providing support and structure but not specifically connecting bones. Therefore, the role of ligaments as the connectors between bones at joints is essential for maintaining joint integrity and function.