The epididymis is a comma-shaped structure composed of an
and an external covering of connective tissue.
Its head lies on the superior surface of the testis, while the
body and tail are posterior to the testis.
Internally, the epididymis contains a long, convoluted
, which is approximately
4 to 5 meters
Sperm must reside in the epididymis for a period of time to
If they are expelled
lack the motility
travel through the female reproductive tract and fertilize an
If sperm are not ejected from the male reproductive system in a
the old sperm degenerate
in the epididymis.