Structural components of a limb prosthesis A prosthesis is comprised of Socket (plastic receptacle in which the residual limb is contained), which is the most important component because it supports the body and transmits all associated pressure and forces developed during ambulation to the residual limb Appendages (eg, hand, foot) and joints (eg, wrist, elbow, shoulder, ankle, knee, hip) Connecting modules that connect appendages and joints to the socket Advanced components are available.