<Li> phalanges (14) </Li> <P> There can be many sesamoid bones near the metatarsophalangeal joints, although they are only regularly present in the distal portion of the first metatarsal bone . </P> <P> The human foot has two longitudinal arches and a transverse arch maintained by the interlocking shapes of the foot bones, strong ligaments, and pulling muscles during activity . The slight mobility of these arches when weight is applied to and removed from the foot makes walking and running more economical in terms of energy . As can be examined in a footprint, the medial longitudinal arch curves above the ground . This arch stretches from the heel bone over the "keystone" ankle bone to the three medial metatarsals . In contrast, the lateral longitudinal arch is very low . With the cuboid serving as its keystone, it redistributes part of the weight to the calcaneus and the distal end of the fifth metatarsal . The two longitudinal arches serve as pillars for the transverse arch which run obliquely across the tarsometatarsal joints . Excessive strain on the tendons and ligaments of the feet can result in fallen arches or flat feet . </P> <P> The muscles acting on the foot can be classified into extrinsic muscles, those originating on the anterior or posterior aspect of the lower leg, and intrinsic muscles, originating on the dorsal (top) or plantar (base) aspects of the foot . </P>

What is the curve of your foot called