circuitry

This term describes the collective arrangement of paths and components rather than a single loop. It evokes an image of intricate, interconnected webs, whether they are etched into silicon or woven through biological tissue. As an uncountable noun, it refers to the system as a whole. You cannot refer to a single "circuitry"; instead, you must use "a circuit" for an individual loop or "a piece of circuitry" when referring to a specific section of the system.