(Answered) Assume that a 30-year-old male is able to produce

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Assume that a 30-year-old male is able to produce sufficient spermatozoa, but because of an obstruction in his duct system, the spermatozoa cannot be discharged through the urethra. If each duct in the system had to be examined to locate the obstruction, explain the sequence in which the ducts would have to be examined, starting with the urethra and termination in the seminiferous tubules.

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