Given a scientific passage and an answer, generate a question for the given answer.

Q: Passage: The pulmonary circulation carries blood between the heart and lungs. The systemic circulation carries blood between the heart and body. Answer: heart and lungs

A: The pulmonary circulation carries blood between what two organs?
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Q: Passage: The cardiovascular system moves nutrients and other substances throughout the body. Answer: cardiovascular system

A: Which human body system system moves nutrients and other substances throughout the body?
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Q: Passage: Crests and troughs are the high and low points of a transverse wave. Answer: transverse wave

A:
Crests and troughs are the high and low points of a what?
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