Compare your circulatory system to a busy street in a city or town.
discuss the types of deliveries and pick ups made by the circulatory
system and what other parts of the body make this possible.

City individuals -different cells. Group of individuals - Organ systems. City Road System- Circulatory system.

Explanation:

Any city has population. The individuals of the population can be considered as the cells that are present in a human body. As a city cannot be formed with individuals, the human body cannot survive without cells. These individuals will belong to different profession and they go to an organisation for doing various work.

These can be compared with the organ system of human body. These organ systems will be performing different functions. The network of any rod in a city can be compared with the circulatory system of human body. As it helps individuals to reach their home of any destination, the presence of arteries and veins can be compared with the highways and capillaries can be associated with side ways of the road system.