Portmanteau Commentary: Requesting Unique Word for Upper Foot

Yes, it's the sole of our feet that touch the ground, that carry us, that takes the impact of each step we take (physically, not metaphorically).
However, surely there should be an appreciacion for each part of of our feet? In English the upper part of our feet are not given the importance of being honoured with their own word. Even the medical term, "Dorsum" or "Dorsal Surface" actually just generally refers to the "upper, outer surface of an organ" (answers.com) which can mean an upper side of an animal, also known as their back, a part if the body that has been given it's own name.
This must change, I say. What should we call the other side of our sole?