Male Reproductive Anatomy

Testes: Seminiferous Tubules

This is where spermatogenesis occurs, as each tubule consists of a basement membrane lined with spermatogonia (germ cells) and sertoli cells.

Sertoli Cells

These cells join to form protective blood-testic barrier- this prevents contact between fragile sperm and body’s blood stream and toxins. These cells also nourish developing sperm and destroy defective germ cells. Secretes fluid, protein and hormones.


This where sperm mature and are stores for 2 to 3 months. When they enter initially, they are immobile and don’t have capacity to fertilize an egg. During transit they become mobile and capable of fertilization. The final maturation is in the reproductive tract (in-vivo) or in lab (in-vitro).