The functional maturation of sperms takes place in

In each testis, there are 200 to 300 lobules and within each lobule are 1 to 4 convoluted loops composed of germinal epithelial cells, called as seminiferous tubules. Between the tubules, there are groups of interstitial cells (of Leydig) that secrete the hormone testosterone after puberty. At the upper pole of the testis the tubules combine to form a single tubule. This tubule, about 6 m in its full length, is repeatedly folded and tightly packed into a mass called as the epididymis. It leaves the scrotum as the deferent duct (vas deferens) in the spermatic cord. Blood and lymph vessels pass to the testes in the spermatic cords. Spermatozoa (sperm) are produced in the seminiferous tubules of the testes and mature as they pass through the long and convoluted epididymis, where they are stored.