Articular limbs and girdles
Each upper limb is composed of arm, forearm, wrist and hand. The Arm Bone - humerus - articulates at the elbow with the bones of the forearm: radio and ulna. The pulse consists of small, massive bones, the carpus. The palm is formed by the metacarpals and the fingers, by phalanges.
Each lower limb consists of thigh, leg, ankle and foot. The thigh bone is the femur, the longest in the body. In the knee, it articulates with the two bones of the leg: the tibia and the fibula. The frontal region of the knee is protected by a small circular bone: the kneecap. Small and massive bones called tarsus, form the ankle. The sole of the foot consists of the metatarsals and the toes (toes) phalanges.
The limbs are joined to the body by a bone system that takes the name of waist or brace. The upper waist is called waist thoracic or scapular (formed by clavicle and for shoulder blade or shoulder blade); the lower one is called pelvic girdle, popularly known as bowl (consisting of sacrum - large bone resulting from the fusion of five vertebrae by a pair of iliac bones and at coccyxformed by four to six fused rudimentary vertebrae). The first holds the humerus and with it the whole arm; the second supports the femur and the entire leg.