D. oxygen,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Answer: exercise secretes a hormone called endorphins which makes you happy
Answer:
Which organs of the male and female reproductive systems secrete fluids that act on the vagina? In the male reproductive system, the [1)Prostate Gland, 2)Bulbourethral Glands, 3)Seminal Vesicles, 4)Testes] secrete(s) a fluid that neutralizes acidic conditions in the vagina.
