Circulatory System

There are three parts to the circulatory system the heart, blood vessels, and blood. The heart is where the blood is produced and where it will pump the blood throughout the body. The blood vessels will carry the blood produced to either the lungs to get oxygen in the blood or it will send the blood with oxygen throughout the body. Blood is produced by the heart. The blood is first produced without any oxygen. The blood is sent to the lungs, where the blood will receive the oxygen. After the blood has enough oxygen it will be sent back to the heart. Once the blood is back at the heart it will be sent throughout the body. When the blood doesn't have any oxygen the color is blue and when the blood has oxygen the color is red.