Gynaecology & Obstetrics Endometriosis and Infertility 0c069ff7 The cells which lie outside blood testis barrier: A Sertoli cells B Spermatocyte C Spermatid D Leydig cells High-Yield Explanation Ans. is d, i.e. Leydig cellsBlood testis barrier is formed by Sertoli cells which keeps the growing germ cells (its all stages) separated from blood.