The cell which forms blood-testis barrier is
Spermatogonia
Primary spermatocyte
Leydig cell
Seoli cell
The blood-testis barrier is a physical barrier between the blood vessels and the seminiferous tubules of the testes.The name "blood-testis barrier" is misleading in that it is not a blood-organ barrier in a strict sense, but is formed between Seoli cells of the seminiferous tubule and as such isolates the fuher developed stages of germ cells from the blood.
General anatomy