Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: Your heart pumps blood around your body. But how does your heart get blood to and from every cell in your body? Your heart is connected to blood vessels such as veins and arteries. Organs that work together form an organ system . Together, your heart, blood, and blood vessels form your cardiovascular system . Answer: cardiovascular system
Solution:
What organ system is comprised of your heart, blood, and blood vessels all working together?