The scrotum is a sac-like structure outside the abdomen in which the testes are suspended. Why is this structure essential?
A. There is too much hormonal influence if they remain in the abdomen.
B. Sperm must be closer to the penis to be ejaculated.
C. There is not enough space in the abdomen to grow properly.
D. Lower temperature is required for normal development of sperm.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
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