Illustration of the anatomy of the anterior cruciate ligament of a right human knee in a medial-anterior view. The anterior cruciate ligament stabilizes the knee joint by preventing the tibia from sliding forward relative to the femur. Note: In the figure, the patella has been removed to better show the attachment of the anterior cruciate ligament. In addition, the distance from femur to tibia/fibula has been increased in the image for better visibility of the structures.