Biology Analogies Help?!?

[girl next door]

So on this worksheet i have im given some organelles and suppose to make analogies to them. i don't really understand analogies.

example: cell wall- cell wall is to the cell as skin is to the body

can anyone help me with some of these?:

centrioles-
chromosomes-
cilia/flagella-
cytoplasm-
cytoskeleton-
golgi apparatus-
lysosomes-
microfilaments-
microtubules-
mitochondria-
nuclear envelope-
nucleolus-
nucleus-
plasma membrane-
ribosomes-
rough ER-
smooth ER-
Vacuole-

if you could help me with some of these, that'd be great