define double circulation ??
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_____Double Circulation system____
The human circulatory system has three key components
➡️ Blood vessels, blood and the heart.
➡️It is called a double circulatory system because blood passes through the heart twice per circuit.
It is responsible for the transportation of nutrients and gases like oxygen, to the body and metabolic waste products away from the body.
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The majority of mammals (including humans) utilize a double circulatory system. This means we have two loops in our body in which blood circulates. One is oxygenated, meaning oxygen rich, and the other is deoxygenated, which means it has little to no oxygen, but a lot of carbon dioxide.
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