Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Q: Question: Examples of organ systems in a human include the skeletal, nervous, and what? Answer: reproductive systems

A: Organ system : Group of organs that work together to perform a certain function. Examples of organ systems in a human include the skeletal, nervous, and reproductive systems.
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Q: Question: What is a layer of saturated porous rock? Answer: an aquifer

A: An aquifer is a layer of saturated porous rock. It lies below the water table. An impermeable layer, such as clay, is below the aquifer.
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Q: Question: What is the second line of defense? Answer: inflammatory response

A:
The second line of defense includes the inflammatory response and phagocytosis by nonspecific leukocytes.
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