The Circulatory system is a network that is made up of blood, blood vessels, and the heart. The circulatory system transfers tissues in our body that contain oxygen and other nutrients. They transport hormones as well as removing unnecessary waste. The Circulatory System allows for your heart to pump blood throughout your body. The Circulatory System has 3 independent systems that work together, the cardiovascular, pulmonary (which are the lungs), and the systemic which consists of arteries, veins, coronary, and portal vessels. This is also responsible for the flow of hormones to and from the cells.