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.