Cell analogy to a car HELP!?

[Rebs =]]

I am comparing my cell to a car , but i cant seem to think of anything for the following

Centriolies
Cilia
Flagella
and i need to know why it is that

 

[scottsdalehigh64]

It is a waste of time to learn biology by comparing a cell to a car.

However, just for you: centrioles = lug nuts, cilia = ash trays, flagella = crank cases.