The growth maintenance and functions of seminiferous tubules and Leydig cells are regulated respectively by

The growth maintenance and function of duct system seminiferous tubules and leydig cells are regulated respectively by

Leydig's cell

Leydig cells are located

Leydig cells are meant for :

Leydig's cells are found in:

Seminiferous tubuleous occur in :

Tubuli recti of seminiferous tubules open into

Leydig's cells secrete: