Which one of the following is the correct route that a sperm follows when it leaves the testis of a mammal?
(a) Vas deferens → epdidymis → urethra
(b) Urethra → epididymis → vas deferens
(c) Epididymis → urethra → vas deferens
(e) Epididymis → vasdeferens → urethra
What is pyruvate? What is its role in respiration?