What is the guts of the toilet called?

The guts of a toilet, commonly referred to as the toilet mechanism or internal components, include the flush valve, fill valve, flapper, and float. These parts work together to control the flushing and refilling processes. The flush valve allows water to flow from the tank into the bowl during a flush, while the fill valve refills the tank afterward. The flapper seals the tank to prevent leaks, and the float regulates the water level in the tank.