Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: 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. Answer: cardiovascular system
A:
The heart and a network of blood vessels that run throughout the body make up what organ system?