As electronic embedded systems are finding their way into and replacing more mechanical-control systems, it might reasonable to expect to see them finding their way into organic systems, such as the human body. Indeed, electronic embedded systems are interfacing with the human body in more ways each day to perform a variety of functions ranging from health monitoring, managing and maintaining the function of systems such as the heart, replacing failed organs by controlling the insertion of drugs or enzymes into the body, and even restoring the use of limbs and senses. In some cases, these capabilities have been around for decades, and the evolution of the electronics is reducing the cost of these systems as well as improving the reliability and life-cycle replacement of these systems. In other cases, these capabilities are emerging as possibilities in the lab but requiring more refinement to become practical in the real world.