How is the circulatory sytem like a garbage truck?

The circulatory system is like a garbage truck because it transports waste products away from cells, similar to how a garbage truck collects trash from neighborhoods. Just as the truck picks up and disposes of waste to keep the environment clean, the circulatory system carries carbon dioxide and other metabolic waste to organs like the lungs and kidneys for removal from the body. This process ensures that the body's internal environment remains healthy and functional.