The circulatory system is responsible for transporting nutrients and oxygen around the body.
Nutrients: from the digestive system, to the rest of the body.
Oxygen: from the respiratory system, to the rest of the body.
Also, the circulatory system carries (transports) the waste (unwanted substances) to eliminate.
CO2: from the body, to the respiratory system.
Other waste: from the body, to the excretory system.
It is involved in the function of nutrition.
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