Question

what can circulatory system in man be compared with

Answer 1

If you telling regarding animals no it can't be compared because in humans there is a major process called double circulation which includes passing of oxygenated & de-oxygenated back to heart & passing through heart to different parts of body

Answer 2

Answer:

circulatory system in human body can be compared to sewage system of an establishment as the complexity of circulatory system in connecting through one place can be used as an analogy to the sewer system of city which gets connected to the ultimate main sewage system chamber