The interosseous membrane is a fibrous sheet of connective tissue that connects two long bones in the body, primarily the radius and ulna in the forearm, and the tibia and fibula in the leg. This membrane plays a crucial role in stabilizing these bones and allowing for the transfer of forces between them during movement. In addition to providing stability, the interosseous membrane serves as an attachment site for muscles and ligaments. It also contains spaces that allow for the passage of blood vessels and nerves, contributing to the overall function and health of the surrounding structures in the limbs.