You are presented with the quiz "What happens when muscles around the prostate gland contracts?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "ejaculation occurs when muscle contractions propel sperm from the epididymes" and "an ejaculation occurs as the muscles around the prostate gland and the penis contract". 

So, what's the best answer to the question?


 

     Sperm leaves the epidiymes      