Arm movements are essential for various daily activities and physical tasks. They involve the coordinated actions of muscles, joints, and nerves, allowing us to perform actions like reaching, lifting, and throwing. The primary joints involved in arm movements are the shoulder, elbow, and wrist, which work together to provide a wide range of motion. Different types of arm movements include flexion, where the angle between two body parts decreases, and extension, where the angle increases. Other movements include abduction, moving the arm away from the body, and adduction, bringing it closer. These movements are crucial for sports, work, and everyday life.