What is he flexible tough band of fibrous connective tissue that attaches one bone to another at a joint?

The flexible tough band of fibrous connective tissue that attaches one bone to another at a joint is called a ligament. Ligaments provide stability and support to joints while allowing for a certain range of motion. They are composed primarily of collagen fibers, which give them strength and flexibility. Proper functioning of ligaments is essential for maintaining joint health and preventing injuries.