2 Words to use with metatarsal

The hind toes are three, like those of the fore leg; and the middle metatarsal bone is much less compressed from side to side than that of the horse.

He explained the primitive characteristics in the arrangement of feathers on wings and body, the absence of primaries and secondaries or bare tracts; the modification of the muscles of the wings and in the structure of the feet (the metatarsal joint).

2 Words to use with  metatarsal