What do you mean by male gonopore?
What do you mean by male gonopore?
A gonopore, sometimes called a gonadopore, is a genital pore in many invertebrates. The positions of the male and female gonopores, either on the base of the leg or on the animal’s sternum, is important in the systematics of crabs.
What is gonopore in cockroach?
Gonopore is the genital pore in some invertebrates and especially some insects. In cockroach , in males the ejaculatory duct is an elongated wide median duct which run backwards in the abdomen and opens out by MALE GONOPORE situated ventral to anus.
Where are lobsters genitals?
Lobsters are dioecious and the sexes are distinguished by the position of the genital apertures (gonopores) and the shape of the first pair of pleopods. In females, the genital aperture is located on the basal segments of the third pereiopods (and in the male, on the final pair).
What is a gonopore in biology?
Definition of gonopore : a genital pore in some invertebrates and especially some insects.
What is female gonopore in cockroach?
The female gonopore is an aperture in the 8th sternum, which lies inside the genital chamber inflected above the 7th sternite. The 7th sternite is also produced backwards into two large oval gynovalvular plates or apical lobes. The genital pouch is also referred to as gynatrium.
What are Penial spicules?
Penial spicules: Penial spicules are located in the spicular pouch. Two spicular pouches are situated on the dorsal side of the cloaca. These are basically evaginations of the cloaca. The penial spicules are enclosed in a spicular sheath and it consists of a cytoplasmic core surrounded by thick cuticle.
What is Titillator in cockroach?
It has a broad base from which several structures arise, on the extreme left is a long slender arm with a curved hook called titillator, next to the titillator is a shorter and broader arm ending in a black hammer-like head called pseudopenis.
What is the use of Penial setae?
Dorsal to the cloaca is a pair of penial sacs that contain a pair of spicules or penial setae, which serve in copulation.
What is Gonopore in Ascaris?
Each spicular pouch secretes and houses a club-shaped spicule or penial seta enclosed in a spicular sheath and it consists of a cytoplasmic core surrounded by the thick cuticle. The spicules help in opening female gonopore during copulation. Sperms of Ascaris are the tail, asymmetrical and amoeboid.
What is Spermatheca in cockroach?
The spermatheca is an ectodermal organ responsible for receiving, maintaining, and releasing sperm to fertilize eggs. The detailed structure of the cockroach spermatheca is described and discussed firstly as an example of an insect integumentary gland, and secondly, from the standpoint of its role in reproduction.
How many Ovarioles do female cockroaches have?
There are two ovaries in female cockroach, one on either side of the alimentary canal. Each ovary consists of eight ovarioles or ovarian tubules which produce ova.
