All living organisms are composed of cells. By doing this exercise, you will discover that a city is an excellent analogy for a cell. No matter where in world city is, they all share common features like city limits, power plant etc. Put your creative and analytical cap on and try to develop analogies of the following organelles

Cell Membrane/Cell Wall

Cytoplasm

Endoplasmic Reticulum

Ribosomes

Golgi bodies

Chloroplast

Nuclear Membrane

Mitocondria

Nucleus

Lysosome

Vacuole

DNA/RNA

Chromosomes