State one function of each of the following parts of human male reproductive system.
(i) Vas deferens, (ii) Testes, (iii) Prostate gland.

Explanation

(i) Vas Deferens : It helps in the passage of sperms.
(ii) Testes : It produces sperms and male sex hormone- testosterone.
(iii) Prostate gland : It secretes alkaline fluid which is discharged into the urethra. It protects sperms from acidity of male urethra.