What is a curved division of the foot?

What is a curved division of the foot?
On the top, it's the instep. On the bottom, it's the arch.
arch
Is it the instep?
Instep.
It's it the instep?
The part of the foot between the globe of the foot and the ankle.
the arch
instep or some people name it an arch
i'd say the arch or instep
but if you are looking for the christen of the bones it is the metetarsals
arch
the arch.
The arch.
The curved part of your foot which is on top is call the instep and the bottom part of your foot is call the arch. When your arches collapses you get flatfeet.