Turbine N2 and N1 inner shaft drives large front n1 fan blades for bypass air. Blow

The turbine, made of a number of fan-like blades, rotates as the heated gas rushes past it. The rotating turbine is connected to a shaft which spins with the turbine. The shaft runs back through the combustion chamber. towards the front of the engine. The power of the rotating shaft is used to spin other fan blades where the air enters the engine. This section is called the compressor – and it forces the air to gain higher pressure as it is pulled further into the engine towards the combustion chamber. Basically, the higher the pressure, the more air is available to ignite and expand in the combustion chamber, which then creates the engine thrust.

N1 fan blades driven by exhaust gasses of last blade sets. Suck.
Compressor section part of outer shaft assembly. Squeeze.
Combuster Compressor hot section fuel air mix and ignition. Bang!