Like the cell membrane, police regulate who comes in and out of the city.

Vacuoles are like grocery stores because they have all of the materials necessary for life.

Just like recycling plants, lysosomes break down lipids, carbohydrates, and proteins so that they can be used by the rest of the cell.

A city's transport system is like the cytoskeleton because it gives the city its shape and helps give routes for transportation.

Factories are like ribosomes because that is the site of where proteins are assembled.

In the ER, many things enter and many things exit. The rough ER is where cars would exit because in the rough ER, there are ribosomes. The smooth ER is where things exit has no ribosomes.

Just like the Golgi apparatus, post offices sort and package materials for storage or release outside if he city.

Just like chloroplasts, solar panels take energy from sunlight and turn it into energy that can be used by the city.

Compost bins are like the mitochondria because they take energy stored in food and converts it to make it more convenient for the city.

The cell wall helps the cell membrane (police) to keep out unwanted visitors.

Like the nucleus, a city hall contains all of the information about the city and controls what happens in the city.