 This is what all the parts and pieces of my prosthetic leg are called and how some of them work. At the bottom, we've got the foot shell. Pretty self-explanatory, this looks like a foot. Unfortunately, it does wear out pretty quickly so I'll get holes in the toes from time to time. Next is the actual prosthetic ankle itself. These move all different kinds of ways. I've got a couple different ones, but there are a lot of brands and a lot of styles you can choose from. This part is the socket and it's what my residual limb or nubbin actually inserts into. So this is what is around my leg all day, giving me the stability to be able to walk. Right underneath the socket is this valve. This is what actually allows air in and out so my prosthetic can suction to me properly. Moving on up, we have the sleeve. This is the external part that connects my prosthetic leg to me. It is sticky on the inside. I'll show you why in just a second. Now this is the liner. It is what is in contact with my skin all day, every day. If you turn it on over the interiors, that same kind of sticky substance that the sleeve is. This allows them to stick together, basically form that suction and allow me to walk. There are variations on all of these and every prosthetic leg is a little bit different, but this is what I use and what some of the parts are called.