Authors : Bakare S. S.
Page Nos : 24-32
Description :
Histomorphology of male reproductive organs of
Ischnura aurora
Brauer consist pair of testis,
vasa differentia and sperm sac. Testes are cylindrical, translucent body located ventrolaterally from
seventh and eighth segment. Each testis opens into thin vas deference which joins in the center forming
sperm sac. Sperm s
ac opens ventrally through slit like male gonopore on ninth segment. Testis shows
adipose tissue, peritoneum, lobule and lateral duct. The lobules are filled with germ cells representing
only one stage of spermatogenesis. The lumen of the duct contains spe
rmatozoa in a group. An
ultramicroscopic structural study of the internal male reproductive system reveals movement of mature
cyst towards lateral canal. Early spermatids arecylindrical with conical nucleus and accumulation of
mitochondrion at the base of
nucleus forming neberkern. A mature spermatozoon is long filamentous
divisible in to elongated head consisting nucleus and long tail axoneme mitochondrial derivative and
secretary vesicle. Vas deference shows two types of secretary granules below microvill
i.
