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by Tanya Long
In animal cells, lysosomes break down food molecules and old cell parts to be reused.
At the recycling center, materials are broken down so they can be reused to make new products.
In plant cells, chloroplasts make food for the cell using energy from the sun through the process of photosynthesis.
Cytoplasm is the jelly like material that fills up the cell. All the other organelles are contained in the cytoplasm.
The city is built on the ground, which "fills up" the city.
On farms, food is grown to supply the people of the city with food.
The golgi body receives proteins and other materials from the ER, then packages and delivers them to other parts of the cell, as well as outside the cell.
Mitochondria supply energy to the cell through a process called cellular respiration.
The postal service receives, packages and delivers materials to other parts of the city, as well as outside the city.
Power plants generate electricity to power the city.
The cell membrane is a skin like structure on the outside of a cell that controls what enters and leaves the cell.
In the same way, a city gate controls who or what enters or leaves the city.
The nucleus contains the DNA that directs all the cell's activities
City Hall holds the office of the mayor, who directs and controls the city's activities.
Proteins and other materials are transported along the ER to get them from one place in the cell to another place in the cell.
In factories, products are made to supply the people of the city.
Goods and people are transported along the highway to get from one place in the city to another.
In ribosomes proteins are made, which are needed to build, repair, and reproduce in a cell.
Food vacuoles store food for the cell.
Water vacuoles store water for the cell.
Grocery stores store food for the people of the city.
Water towers store water for the city.
design by Dóri Sirály for Prezi
Waste vacuoles store waste for the cell.
The city dump stores all the trash for the city.
In plant cells, a cell wall is a rigid structure outside the cell membrane that supports and protects the cell.
In the same way, a city wall is a rigid structure that protects the city.