Answer:
1. Just like a city, the human body have certain parts of it that are needed for specific tasks like reasoning which is done in the brain and digestion that's done in the stomach, cities are organized similarly with certain groups of people with certain jobs like politicians that make decisions.
2. The respiration system brings air into the lungs by expanding, this oxygen is absorbed into the circulatory system through the alveoli which have capillaries with extremely thin walls, allowing oxygen in and carbon dioxide to escape. The oxygenated blood is carried to the heart which uses some of it, the pumps the rest throughout the body so that every organ and cell has enough oxygen, and when the oxygen is used by your body it creates the waste product carbon dioxide which is carried through the bloodstream, back to the alveoli, and exhaled.
4. Although Gabe is right about organs keeping us alive, he is wrong about cells not being important because every organ, bone and hair in or on your body is made up of cells, so without cells you wouldn't have any organs to keep you alive.
Step-by-step explanation:
Hope this helps :)