What is the primary purpose of ligaments in the human body?

The primary purpose of ligaments in the human body is to connect bone to bone. Ligaments are tough, flexible bands of connective tissue that form connections between the bones at joints, providing stability and support while allowing for movement. They play a crucial role in maintaining the integrity of the skeletal system by reinforcing joints and preventing excessive or abnormal movements that could lead to injury. Ligaments enable the skeletal system to function properly, ensuring that the structure remains intact during physical activity.

In the context of the other options, connecting muscle to bone is the role of tendons, which serve a different function in the body related to movement. Supporting organs often falls under the duties of connective tissues, such as fascia or the peritoneum, rather than ligaments. The production of blood cells occurs primarily in the bone marrow within certain bones, and is not a function associated with ligaments. This clarifies why the option regarding the connection between bones accurately reflects the primary purpose of ligaments.