A cell membrane is like a gate to the city, because it separates the city from surrounding cities.

The city hall of the city, because it contains past information and important facts about the city, like the cytoplasm contains important organelles of the cell.

The library of the city, because the nucleus stores the cells information, just like a library stores information that is open to the public.

The cytoskeleton is like brick in any city building because like the building it gives the cell it's shape and support.

The street cleaners of the city, because they remove the toxins from your body like street cleaners remove the dirt.

The rough ER is like the fed ex truck of the city, because it transports materials throughout the cell.

The bridge of the city, because they link amino acids together like a bridge links land together.

The post office of the city, because like the rough ER it delivers proteins, but it also sorts and processes them, which compares to the job of a post office.

The telephone poles of the city, because they transport sound through the city like the vesicle transports materials through the cell.

The power plant of the city, because it provides energy to the cell like a power plant supply's energy to the city.

The storage units of a city, because they store peoples items like the vacuole stores the cells materials.

The city's recycling plant, because it breaks down old materials to be used again like the lysosome breaks down old cell parts.

The city's mote, because it provides the shape of the city and gives protection like the cell wall.

The restaurant of a city, because it provides energy to those who eat there, like the chloroplast provides energy when carrying out photosynthesis.