MEDIUM. Copulation occurs at night during the summer. The testes lie on each lateral side in the 4th – 6th abdominal segments. In which of the labelled parts are the sperms stored? Male Reproductive System of Cockroach/Grasshopper Male Cockroach: Antennae are longer than body and third segment shorter than second. After that, she deposits it in a warm humid location. 9. The male reproductive system of Periplaneta consists of a pair of testes, a pair of vasa deferentia, an ejaculatory duct, a pair of seminal vesicles, a mushroom-shaped gland and a phallic gland. Vas deferens arises from each testis, opens into ejaculatory duct through seminal vesicle. The female reproductive organ is comprised of a pair of oviducts, vagina, collaterial gland, gonapophyses and spermatheca (fig. Reproductive System of Cockroach: The sexes are separate. Female reproductive system consists of a pair of ovaries, oviduct, vagina, genital chamber and colleterial glands. A pair of anal styles (clasper) is present. Study the given figure of reproductive system of male cockroach. These attractants are detected by the chemoreceptors located in the antennae of the male. Consider the following four statements (i)- (iv) and select the correct option stating which ones are true (T) and which ones are false (F) each testis formed of "3 or 4 lobes". Laying Eggs. A thin vas deferens arises from each testis. The male reproductive system con­sists of a pair of testes, a pair of vasa deferentia, a pair of seminal vesicles, an ejacula­tory duct, a conglobate gland and a gonop­ore (Fig 25. Reproductive System Cockroaches are dioecious and sex organs are well developed. each lobe divided into many lobules (b) Vasa deferentia - A vasa deferense arises from each testis these open in an ejaculatory duct. 8.3). In the male cockroach, it lies between the tergum of the tenth and the sternum of the ninth abdominal segment, and is surrounded by chitinous rods called gonapophyses which are concerned with copulation. View Answer. Mesosternum is partly divided and ninth sternum is visible. Abdomen is narrow and a seventh sternum undivided. Male reproductive system consists of a pair of testes lying one on each in 4th and 6th segments. 33). Male reproductive system consists of a pair of testes, vas deferens, ejaculatory duct, utricular gland and phallic gland. 2. The cockroaches are dioecious (unisexual) animals. The Male Reproductive Organs: i. Testes: They are a pair of faintly […] Male Reproductive System It is located in the posterior part of the abdomen. It opens into ejaculatory duct through seminal vesicle. REPRODUCTIVE SYSTEM IN INSECTS Sexual dimorphism is noticed in cockroach In male cockroach, at the posterior end of the abdomen there is a pair of short segmented anal cerci and unsegmented anal styli. View Answer. A thin duct called vas deferens begins from the posterior end of each testis. MEDIUM. Reproduction commences when a male cockroach backs into a female cockroach, depositing sperm. Reproductive System: Cockroaches are dioecious. In Cockroach an ovary is formed of ovarioles. After fertilization, a female American cockroach produces an egg case known as an ootheca. REPRODUCTIVE SYSTEM. Male reproductive system: 1. The male reproductive system of cockroach consists of the following organs. The female carries the ootheca on her abdomen for a short time, usually a day or two. The female cockroach emits a specific, volatile, odorous sex attractant or pheromone to draw the male to her for mating. In female cerci alone are present and styli are absent. 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