Locate and discuss the making up of the shoulder, upper arm, and lower arm. Utilizing diagrams and a model, see how the clavicle articulates with the scapula laterally and with the sternum medially. The functions of the clavicle and scapula, along with the hinge joint formed with the ulna at the elbow, allows up and down motion. The radius and ulna form a pivot joint proximally which allows the palm to point up or down. The remaining bones of the arm are the carpals, metacarpals, and phalanges. The saddle joint formed by the thumb allows crossing over the palm. The hip bones major sections are viewed, the articulation at the pubic symphasis, the acetabulum socket, and the formation of a ball and and socket joint allowing specific motion. The femur, tibia, and fibula are the large bones of the leg, with the femur forming a hinge joint at the knee with the tibia.