The appendicular skeleton consists of the bones that form the limbs and the girdles connecting them to the axial skeleton. It includes the bones of the arms, legs, shoulders, and pelvis. This part of the skeleton is essential for movement and mobility, allowing humans and other animals to perform various activities. The appendicular skeleton is made up of 126 bones in total. The upper limbs include the humerus, radius, and ulna, while the lower limbs consist of the femur, tibia, and fibula. The pectoral girdle connects the arms to the body, and the pelvic girdle connects the legs, providing support and stability.