Dear student
Leydig cells are located between the seminiferous tubules of testis whereas sertoli cells are located within the seminiferous tubules.
Function of leydig cells is to secrete a class of hormones called androgens(mainly testosterone), by the action of LH (luteinising hormone) secreted by pituitary gland.
Function of sertoli cells 1. provide nourishment to sperms
2. secrete APC(androgen binding protein) which transports testosterone to developing sperms to aid their development.
3. creation of hemato-testicular barrier
regards