Normal foot. Coloured X-ray of a healthy human foot seen from the top (antero-posterior or dorso- plantar projection). The foot comprises 26 bones and two sesamoid bones (not seen). The toes (top) are formed from phalanx bones. There are two phalanges in the big toe, and three in the other four toes. Behind the toes are five long metatarsal bones (centre). These articulate with the five tarsal bones of the mid-foot. The mid- foot joins the hind-foot at the semi-circular joint (lower centre). The hind-foot comprises the calcaneus (heel) and the talus, which forms the pivot of the ankle with the tibia (bottom).