The heart and a network of blood vessels that run throughout the body make up what organ system?
immune system
lymphatic system
respiratory system
cardiovascular system
The organs that make up the cardiovascular system are the heart and a network of blood vessels that run throughout the body. The blood in the cardiovascular system is a liquid connective tissue. Figure below shows the heart and major vessels through which blood flows in the system. The heart is basically a pump that keeps blood moving through the blood vessels.