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.What is the result of the interaction between these two body systems? A. They turn the protein in blood into food energy for the digestive system.B. Oxygen-filled blood circulates throughout the body.C. Food energy breaks down, and turns it into heat.D. Old blood is removed from the body.