It controls the movements of muscles of mouth parts. Our mission is to provide an online platform to help students to discuss anything and everything about Zoology. Anal styles are absent. The secretion of collateral glands helps in the formation of ootheca. The tubules of left collateral glands are opaque white while those of right transparent and colorless. In mating, first the male gets under female, extends his left hooked phallomere into the female genital chamber, clasping a small sclerite in front of ovipositor and then moves from beneath her. The stomodeal valve prevents the passage of food from midgut into the gizzard. But they are fused at regular intervals in the thorax and abdomen to give rise to nerve ganglia. Sexually mature male and female cockroaches generally mate during nights from March to September months. About one week after mating the female produce an ootheca and at the peak of her reproductive period, she may form about two ootheca per week. Older females were less choosy than younger females. Digestive system of cockroach consists of the mouth parts, a long alimentary canal and a pair of salivary glands. They are excretory in function. : Reproductive organs of female cockroach. The heart consists of 13 funnel shaped chambers. (c) A terminal, short, dilated sac-like rectum which opens to the outside by the anus. The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. The abdomen of female cockroach is boat-shaped and the last segment is blunt. Disclaimer Copyright, Zoology Notes | Exclusive Notes on Zoology for Students, Reproductive System of Grasshopper (With Diagram), Earthworm: Digestive and Reproductive System | Zoology, Frog: Digestive, Respiratory & Reproductive System | Zoology, Essay on Cockroach: Digestive System and Respiratory System, Classification of Connective Tissue | Animal Tissues | Zoology. Classification of cockroach 2. If the female had continuous food availability it could produce an ootheca every 2-3 days to 30 °C. (2) Sixteen ova, one from each ovariole of the two ovaries, are dischagred at a time into the genital … Ootheca is a dark reddish to blackish brown capsule. It secretes material which forms the dark and hard covering of ootheca or the egg pod. The oesophagus is continued into a thin-walled sac-like dilatable crop. If you wanted to slow it down you could lower the temp to 25 C and you would double all the times (approximately). Development is direct, the nymphs look very much like adults and life history includes three stages – egg → nymph → adult. There is an accessory reproductive gland in the 6 th and 7 th abdominal segments that is mushroom shaped. Each ovary is formed of a group of eight ovarian tubules or ovarioles. 4. The female reproductive system is made up of internal and external organs that function to produce haploid female gametes called eggs, secrete female sex hormones (such as estrogen), and carry and give birth to a fetus. The male reproductive system consists of a pair of testes present in the 4th and 6th segments of the abdomen laterally: The female reproductive system consists of two ovaries in the 2nd and 6th segment of the abdomen. The utricular gland is a large whitish gland which is made up of two kinds of glandular tubules – (i) the peripheral, long, slender tubules utriculi majores, whose secretion also forms the covering of spermatophore and (ii) the central, short tubules, utriculi breviores, whose secretion nourishes the sperms. As they are laid they become fertilized by sperms ejaculated simultaneously from spermathecae. A cockroach can receive several images with the help of several ommatidia. Difference between male and female cockroach 5. Reproductive System; Cockroaches are dioecious animals, i.e. The circulatory system is of open type in cockroach. Common Oviduct: The lateral oviducts unite below the hind gut and form a common duct which opens into the genital chamber by a vertical slit, the female gonophores. Furthermore, the formation of sperms occurs in a cold environment, whereas the formation of ova occurs under warm conditions within the ovaries. It is ectodermal in origin and lined by a cuticle. It is terrestrial, nocturnal, cursorial (fast runner), omnivorous and unspecialized insect. The human reproductive system and the ability to reproduce make life possible. It is about 8 mm long and 5 mm high. 2. are a part of reproductive system of female cockroach and are associated with utricular gland . 5. The vagina which is the posterior wider part of the common oviduct opens into a large genital pouch by a vertical slit like vulva or female genital pore on the 8th sternum. The key difference between male and female reproductive system is that the male reproductive system produces sperms while the female reproductive system produces egg cells or the ova. The haemolymph circulates in the body cavity by the contraction and relaxation of the heart which is assisted by the alary muscles. Each eye consists of about 2000 hexagonal ommatidia. Oviducts: These are a pair of short but wide ducts; each arises from an ovary and extends backwards. It is situated between the Malpighian tubules (anterior) and hepatic caeca (posterior). Each testis consists of 30-40 small whitish transparent follicles in which the spermatozoa are formed. The process of copulation lasts for an hour or so, after which the male and female separate. Male Reproductive System It is located in the posterior part of the abdomen. The adult female would take about 9 days to produce an ootheca containing about 12- 16 eggs. Nymphs are similar to the adult in morphology and physiology but are smaller in size, paler in colour, wingless and sexually immature. These parts function together to do many things, such as producing eggs and hormones, maintaining a … 3. Excretory System 5. The ovaries produce the egg cells, called the ova or oocytes. Thus development of cockroach is simple and direct with little metamorphosis (hemimetabola) and shows gradual metamorphosis or paurometaboly. The reproductive system is the human organ system responsible for the production and fertilization of gametes (sperm or eggs) and, in females, the carrying of a fetus. The nymph undergoes moulting about 13 times to become the adult. Its narrow duct opens into the genital pouch by the side of male gonopore. This process is called ovulation. The hinder part of each heart chamber has a pair of minute lateral openings called ostia which allow the haemolymph to flow in only one direction i.e., from pericardial sinus to the heart and not vice versa. This is called mosaic vision. Colleterial glands: These are two, asymmetrical, very much branched and tubular glands. Situated between the female genital pore and anus inside the genital pouch there are 3 pairs of chitinous plate like structures called gonapophyses. It gives off nerves to the antennae and eyes. Each of these ganglia is formed by the fusion of two ganglia except the seventh. There is a heart and aorta but no capillaries or veins. The female deposits the ootheca near a source of food by either simply dropping it or gluing it to a surface with a secretion from her mouth. The alimentary canal consists of three parts namely: Foregut or the stomodaeum is the first part of the alimentary canal. If one of these ova is fertilised by a male sperm, this leads to pregnancy. It is also formed by the fusion of three pairs of ganglia – mandibular, maxillary and labial ganglia. 2. In these projections, developing ova are present in a row, which looks like a series of beads. They are protandrous, there is no self-fertilization. There are backwardly directed bristles behind the teeth in the pulvillus which act as strainers and allow only fine particles to pass through. Female Reproductive Organs of Cockroach: (i) Ovaries:. Privacy Policy3. OVARIES ❤. It contains dorsal anus, ventral male genital pore and gonapophyses. The tracheoles which are thin and less than 1 micron in diameter end blindly in the tissue cells. The latter lies immediately ventral to the anus, between 9th and 10th sterna. The pulsatile heart of cockroach is a long narrow tube with anterior end open and posterior end closed. Earthworms are monoecious or hermaphrodites. A pair of large ovaries are present laterally in 2,3,4,5,6 segments surrounded by fat bodies. There are many species of cockroaches in the wild and are of least economic importance. Answer ❤. All the eight ovarioles of an ovary unite to form a short and wide lateral oviduct. Nervous System 6. The antennae of male cockroaches are smaller than that of the females. The tracheae have cuticular lining called intima or taenidia which form spiral or ring like thickening around the tracheae. A typical egg case contains about 14 to 16 eggs. They are about 60 to 150 in number and are arranged in 6-8 bundles. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. Development is direct, the nymphs look very much like adults and life history includes three stages – egg → nymph → adult. A pair of ovaries lies laterally in the 2nd and 6th abdominal segment. The nerve cords are solid. 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