5. d. Uterus
→ The uterus is the mother's womb, where the baby grows and develops.
6. d. It produces sperm cells needed to fertilize egg cells to produce new human being
→ The male's reproductive system transports and maintain a sperm cell to fertilize egg cells.
7. c. to produce sperm cells
→ The scrotum and testes needs to be maintained in a low temperature to help produce sperm cells.
8. d. Vagina
→ The vagina is also called as a birth canal.
9. b. seminal vesicle
→ The seminal vesicle produces a sugar-rich fluid that provides energy to sperm's motility.