A City Is Like A Cell
Olivia Scheible & Thomas Philpot
Nucleus: Mayor of City Hall- The nucleus houses the majority of genetic material of a cell. The nucleus is the “brain” of the cell and controls all activity within the cell. Using DNA as a blueprint (like the blueprints of a city) the nucleus directs the production of proteins.
Ribosomes- Factory: The ribosomes carry out manual labor in the form of protein synthesis for the nucleus. The proteins created are essential to cell and organismal function. Think of proteins as machines for cells like electricity and plumbing are essential in a real city. For example, enzymes are a type of protein without which life could not exist.
Endoplasmic Reticulum- Highways and Roads: This extensive network makes up approximately one half of all membranous tissue of the cell and is the site of membrane and protein synthesis. The ER system is much like a road system along which industry can be found. Goods are manufactured and shipped to areas through roads.
Cell wall and Cell Membrane- City Walls and City Limits: Cell membranes are found in animal cells whereas cell walls are found in plant cells. Cell walls and membranes have similar functions. Like a city perimeter, cell membranes surround the cell and have the ability to regulate entrance and exit of substances, thereby maintaining internal balance. These membranes also protect the inner cell from outside forces.
Cytoplasm- Lawns and Parks: Cytoplasm is a gel substance found inside the cell. The cytoplasm encases, cushions and protects the internal organelles. It is the cell landscape found in any space where organelles are not and therefore is much like the lawns and parks of our city.
Golgi- Post Office: Like a post office, the Golgi Apparatus is used for shipping those goods created by the ER and ribosomes to the rest of cell.
Chloroplasts- Solar Plant: Chloroplasts are organelles found only in plant cells. Like a solar energy plant they use sunlight to create energy for the city. Chloroplasts is where photosynthesis happens.
Mitochondria- Energy Plant: Mitochondria are found in both plant and animal cells and is the site of cellular respiration. Like a energy plant of a city. Processes the energy from the sun
Lysosomes- Waste Disposal and Recycling: The lysosomes are digestive sacs that can break down macromolecules in the cell. Like waste disposal in a city, lysosomes help keep excessive or bulky macromolecules from building up in the cell.
Peroxisomes- Water Treatment Plant: Filters and breaks down toxins in the cells like a water treatment plant does to water for us.
Vacuoles and vesicles- Water Towers and Warehouses: Have a variety of functions as containment units for anything in excess in a city. They can hold many substances from organic molecules to simple excess water.