Where are Sertoli cells found?

The cells of $Leydig$ produce and secrete .......... .

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.

The Leydig's cells secrete:

The region outside the seminiferous tubules which contains small blood vessels,Leydig cells,and other immunologically competent cells is called $:-$

The ejaculatory duct is formed by the union of which of the following?