Compressor section part of outer shaft assembly. Squeeze!
This compressor has rotors and stators.
The rotors are moving. They increase the kinetic energy of the gas.
The stators are not moving. They are used to turn the kinetic energy into an increase in pressure.

N1 fan blades driven by exhaust gasses of last blade sets. Suck!
Combuster Compressor hot section fuel air mix and ignition. Bang!
Turbine N2 and N1 inner shaft drives large front n1 fan blades for bypass air. Blow!