Answer
Sperms travel through a series of ducts from the testes to the urethra: these include the efferent ductules; the duct of the epididymis; the ductus deferens and the ejaculatory duct.
Propelled by cilia of the cells of the seminiferous tubules, sperms are moved from testes to epididymis through 12 efferent ductules. Sperm mature in the epididymis and are stored there-- in a site on the posterior side of the testes. In the process of maturation they pass from the clublike anterior head travel through the body of to the tapered tail of the slender duct of the tube of the epididymis. It takes sperms about 20 days to travel from head to tail of the epididymis. Stored in the epididymis and adjacent tissues, mature sperms are fertile for about 50 days ; if they are not expelled in an ejaculate they are absorbed by the the epididymis or degenerate and die. Much of the fluid of the fluid excreted by the testes is absorbed by the in the epididymis.
Work Step by Step
The duct of the epididymis straightens out at the end and makes a 180 degree turn and becomes the ductus deferens ( vas deferens).
This tube is more muscular than the epididymis, It passes through the inguinal canal with the spermatic cord and enters the pelvic cavity.
The ductus then courses close to the urinary bladder, medially, and continues downward, widening behind the bladder to form the ampulla. Later, the thick-walled and richly innervated (ANS) ductus unites with the duct of the seminal vesicle.
The ejaculatory duct is formed by at juncture of the ductus deferens and the seminal vesicle. It ( about 2 cm long ) passes through the prostate gland and empties into the male urethra.
