There are tons of different 'inner parts' to us. People have tried to define them in a dizzying array of often contradictory ways. It is a hard task.
There are also the Reins (in Hebrew it is the same word as 'kidneys'): which is more or less the throne of your decisions: your axioms and your assumptions.
There is your Heart: your meditator, the treasure where you store up good and bad things, where you draw from to provide strength in your actions.
There is your Brain: your physical thinker, when you memorize Scripture, you are not hiding it in your heart (you need to meditate on it to do that), you are storing it in your Brain. This is good, and very important, but not the same as meditating.
There is your Persona, or Personality: your makeup of emotional, physical, and mental (brain) preferences.
The difference between your Soul and Spirit is hard to define, because each has multiple meanings and uses, some of which overlap.
But there is your Nephesh life: you are alive. Animals have this too.
There is your individual Spirit: which goes to heaven and receives a glorified Body.
There are also terms which refer to two or more of these working in combination., such as your Will: the combination of your Heart and Reins.
That is the best I can do off the top of my head.
