......... performs a dual function as a primary sex organ as well as an endocrine gland.

What happens when the $vas$ $deferens$ is cut in humans?

Match the columns.

Column $I$	Column $II$
$(a)$ Vas deferens	$(1)$ Duct that transports sperm from the epididymis to the urethra.
$(b)$ Spermatogenesis	$(2)$ Process of formation of spermatozoa from spermatogonia.
$(c)$ Prostate gland	$(3)$ $A$ gland surrounding the urethra that secretes seminal fluid.

Read the following paragraph with two blanks: Each testis has about $A$ compartments called as testicular lobules. Each lobule contains $B$ highly coiled seminiferous tubules in which the sperms are produced. The correct option for the two blanks is

$A$

$B$

In humans, the testes are located outside the abdominal cavity within the scrotum. What is the purpose of this arrangement?

Which organ of the human male reproductive system is not paired?