Which areas of the Saturn V rocket were used by the crew?

The Saturn V rocket was divided into many parts and sections. It was a multi-stage rocket divided into 3 main parts. On top of the third and final stage was the spacecraft that the crew needed for a trip from the Earth to the Moon. The space craft consisted of the LM: Lunar Module; The SM: Service Module and the CM: Command Module. 3 astronauts could fit in the CM while only the LM was designed for only 2. The service module was unmanned but had all the fuel and oxygen for the crew.