Ovarioles
Encyclopedia
An ovariole is one of the tubes of which the ovaries
of most insect
s are composed. Typically an insect will have two ovaries. The constituent ovarioles lead to two oviducts, which converge into a single oviduct. The ovarioles are composed of a germarium and a set of ovarial follicles.
, there are 16 ovarioles per ovar and, there are 2 ovaries. The most anterior portion of the ovariole consist of the germarium, the location of germ line stem cells (GSC's), terminal filaments, cap cells and intergermarial sheath cells. The GSC's are what later on give rise to egg's. There are 14 distinct stages in the development of oocyte, and the progression in development occurs anterior to posterior along the ovariole. At the end of stage 14, the egg passes through the lateral oviduct before entering the common oviduct and then exiting via the uterus.
Ovary
The ovary is an ovum-producing reproductive organ, often found in pairs as part of the vertebrate female reproductive system. Ovaries in anatomically female individuals are analogous to testes in anatomically male individuals, in that they are both gonads and endocrine glands.-Human anatomy:Ovaries...
of most insect
Insect
Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...
s are composed. Typically an insect will have two ovaries. The constituent ovarioles lead to two oviducts, which converge into a single oviduct. The ovarioles are composed of a germarium and a set of ovarial follicles.
In D. melanogaster
In Drosophila melanogasterDrosophila melanogaster
Drosophila melanogaster is a species of Diptera, or the order of flies, in the family Drosophilidae. The species is known generally as the common fruit fly or vinegar fly. Starting from Charles W...
, there are 16 ovarioles per ovar and, there are 2 ovaries. The most anterior portion of the ovariole consist of the germarium, the location of germ line stem cells (GSC's), terminal filaments, cap cells and intergermarial sheath cells. The GSC's are what later on give rise to egg's. There are 14 distinct stages in the development of oocyte, and the progression in development occurs anterior to posterior along the ovariole. At the end of stage 14, the egg passes through the lateral oviduct before entering the common oviduct and then exiting via the uterus.