To maintain the flow of blood in one direction
Well,circulatory system is made up of BLOOD and heart.
Circulatory System has blood.
circulatory system because blood flows through your veins
cardiovascular, circulatory and respiratory.
Valves ensure the flow of blood in a single direction. Unidirectional blood flow is very important for the circulatory system to function properly. When one of the valves do not work properly, blood does not flow properly in one direction and there is going to be some backward current. This is called shunting and can have drastic consequences if not treated immediately.
A closed circulatory system
blood delivers oxygen to the cells
The circulatory system consists of the heart and blood vessels.
Closed circulatory system.
An open circulatory system is a type of circulatory system found in some invertebrates, where blood is pumped into an open body cavity called a hemocoel. The organs are bathed in this blood, and nutrients and waste are exchanged directly with the cells. Unlike closed circulatory systems, which have blood contained within vessels, open circulatory systems have a more limited ability to control the flow and direction of blood.
The respiratory system works directly with the circulatory system when to oxygenate blood.