number 2 is for question 1
number 1 is for question 3
number 4 is for question 2
number 3 is for question 4
Answer:
The ejaculatory duct is a tube that joins the vas deferens and the seminal vesicle. The ejaculatory duct empties mature sperm and semen into the urethra.
Explanation:
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The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.