The invention relates to a sensor system for implantation into a body of a living being, comprising a measuring unit for measuring parameters of the body and generating corresponding measurement signals, a transmitting unit for transmitting signals using the measurement signals, a control and analysis unit which is connected to the measuring unit and the transmitting unit in order to process and prepare the measurement signals and control the transmitting unit for transmitting the transmitting signals, an energy storing unit for supplying energy to the units, and an outer casing that at least partly surrounds the measuring unit, the transmitting unit, the analysis unit, and the energy storing unit. The system comprises at least two thinned substrate layers on which the measuring unit, the analysis unit, and the transmitting unit at least partly take the form of circuits, said substrate layers being stacked one above the other and being connected to one another by means of electric vias for the transmission of signals between the substrate layers.
