How does the Reproduction system of insects work? Information About Reproduction System Of Insects
Reproduction System Of Insects;
The internal reproductive system of insects is basically segmented, and this segmentation is more obvious in the female. In some very primitive female insects, each abdominal segment has a pair of ovarioles, or egg-forming tubes, which are linked together and are open to the outside between the eighth and ninth segments. In most other female insects, the ovarioles form two large structures, the ovaries, which extend almost the entire length of the abdomen. Leading from each ovary is an oviduct, and the oviducts join to form a larger duct, the vagina. Opening into the vagina are the ducts of various accessory glands, which secrete substances that coat the eggs as they pass through the vagina.
Also opening into the vagina are ducts leading from the spermathecae, the receptacles into which sperm are passed during copulation. If the ducts from the spermathecae are open when the eggs pass through the vagina, the eggs will be fertilized. If the eggs are not fertilized, they may develop parthenogenetically; that is, without being fertilized. Parthenogenesis occurs intermittently in the honeybee, where fertilized eggs produce females and unfertilized eggs produce males. Parthenogenesis occurs regularly in only a few types of insects, including sonıe sawflies and stick insects.
In the male insect, sperm cells are produced in paired organs called testes and are conveyed from each testis to a seminal vesicle where they are stored. Ducts leading from each seminal vesicle join to form an ejaculatory duct, which leads to the outside at an opening known as the gonopore.