The job of the human heart is to circulate blood through all of the body's arteries, capillaries, and veins. The job of the human lungs is to supply the small amount of blood in them with oxygen. The interaction of these two parts of the human body results in a system that

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B

All cells new oxygen and blood is a way for them to get it


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The interaction of these two parts of the human body results in a system that KEEPS THE PERSON ALIVE. hope I helped!

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