Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: The female reproductive system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus.

Answer: What system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus?


Question: Radioactivity is the release of particles and/or energy from the nucleus of an atom.

Answer: What is the release of particles and/or energy from the nucleus of an atom described as?


Question: The major entrance and exit for the respiratory system is nose facial orifice.

Answer:
The major entrance and exit for the respiratory system is which facial orifice?