What role do ligaments play in the skeletal system?

Ligaments are key components of the skeletal system, primarily functioning to hold bones together at the joints. They are made of strong, flexible connective tissue that provides stability and support while allowing for a certain degree of movement between bones. By maintaining the proper alignment of bones, ligaments play an essential role in joint integrity and help to prevent dislocations and injuries during movement.

In the context of the other options, the first choice describes the role of tendons, which connect muscles to bones and facilitate movement. The third option pertains more to cartilage, which serves as a cushion in joints and absorbs shock during physical activities. The fourth choice addresses a function of bone marrow, where the production of red blood cells occurs, which is unrelated to the functions of ligaments. Thus, the primary role of ligaments in the skeletal system is accurately represented by the correct answer, emphasizing their importance in joint structure and overall mobility.