The purpose is basically the same as a humans
Example of closed Circulatory animals is worms
grasshoppers, have an open circulatory system
main organs of the circulatory system are the heart and veins. their purpose is to circulate blood in the body.
It helps plants and animals live. It also is apart of the circulatory system.
A circulatory system that involves the lungs is referred to as a double circulatory system. This is opposed to a single loop circulation that fishes have.
The circulatory system.
Animals that breathe using lungs have a pulmonary circulatory system. In this system, the lungs are dependent on the flow of blood from the systemic circulatory system, which works in tandem with the pulmonary system to provide blood flow to these vital organs.
The common purpose of the respiratory and circulatory systems are bringing oxygen into the body for cellular processes, and bringing carbon dioxide waste out of the body. The circulatory system has many other functions as well.
Lower animals like the moluscsearthworm
yes, it has a open circulatory system, which is not contained within veins.
prawns
Diffusion.