Crossed muscles refer to a specific arrangement of muscle fibers that cross over each other, allowing for a greater range of motion and flexibility. This anatomical feature is commonly found in certain muscle groups, such as the biceps and triceps, which work together to facilitate movements like bending and straightening the arm. The crossed muscle arrangement enhances the efficiency of muscle contractions, enabling coordinated movements. This design is particularly important in activities that require precise control, such as sports and dance, where fluid motion and agility are essential for performance.