Why are the male testes located in the scrotum, outside the abdominopelvic cavity?.

Because sperm production is sensitive to heat if they get too hot, cells in the tubules will not develop into sperm in temperature above 37. This is why testes are out side the body where they are cooler.

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the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.