I really like this system. In the circulatory system,the blood goes around the body. We are illustrating the arm. The red blood has oxygen in it,and the blue blood has no oxygen. If we didn't have blood we would be dead as a doornail.
Blood carries blood cells.
When you eat something the food goes down the esophagus. Then the food is broken down into chemicals the body can use. The food goes down into the stomach,small,and large intestines then it is digested. The heart puts oxygen into the blood and the heart pushes the blood. Then the blood goes through your body.