Normal foot. Coloured X-ray of a healthy human foot seen from the side (lateral projection). The foot comprises 26 bones and two sesamoid bones (not seen). The toes (left) 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 five tarsal bones in the mid-foot (centre right). The calcaneus (bottom right) forms the heel. The shadow from the top right of the calcaneus is the Achilles tendon. The heel articulates with the talus, which forms the pivot of the ankle with the tibia (top right).