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. 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. All the eight ovarioles of an ovary unite to form a short and wide lateral oviduct. Female organs include – Ovary (one pair) (segment 13) In this article we will discuss about:- 1. The thoracic spiracles are situated one pair between prothorax and mesothorax and the other between meso and metathorax. Depending upon the position the phallomeres are classified into three types – right, left and ventral phallomeres. Furthermore, the formation of sperms occurs in a cold environment, whereas the formation of ova occurs under warm conditions within the ovaries. Although diverse, insects are quite similar in overall design, internally and externally. The nervous system consists of the following: The supra-oesophageal ganglion or the cerebral ganglion is a bilobed structure formed by the fusion of three pairs of ganglia viz., proto, deuto and tritocerebrum. © 2020 - Agriculture. Each testis consists of 30-40 small whitish transparent follicles in which the spermatozoa are formed. Difference between male and female cockroach 5. The conglobate gland also secretes the covering of spermatophore. They help in copulation, egg-laying and in the formation of ootheca. These are a pair of unequal sized structures where in the right spermatheca is narrow and tubular while left spermatheca is sac like. Each trachea ends in a large terminal cell called tracheole cell or tracheal end cell from which arise very fine tubes called tracheoles. It secretes material which forms the dark and hard covering of ootheca or the egg pod. The sperms which are formed inside the testes are carried through the vasa deferentia and passed to the seminal vesicles. They are called the prothoracic, mesothoracic and metathoracic ganglia. The antennae are relatively larger than that of the males. The elaborate tracheal system carries oxygen directly to all the body cells. It is ectodermal in origin and lined by a cuticle. All these longitudinal tracheal trunks are interconnected by transverse commissures which anastomose to form a network. Collaterial glands : These are a pair of white and highly branched accessory reproductive glands located dorsally to the genital pouch. Ovaries: One pair of ovaries, present at 13th segment. This reproductive behavior begins with winged males and virgin winged queens leaving the existing nest and swarming to search for a mate from another colony. Our mission is to provide an online platform to help students to discuss anything and everything about Zoology. The female cockroach secrets a pheromone or sex attractant which attracts the male cockroach. With the help of several ommatidia, a cockroach can receive several images at a time of an object. Both male and female reproductive systems have organs called gonads that produce gametes. It contains dorsal anus, ventral male genital pore and gonapophyses. 2. are a part of reproductive system of female cockroach and are associated with utricular gland . 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 inner lining of the armarium is raised into six chitinous powerful teeth, which form an efficient grinding apparatus. The latter lies immediately ventral to the anus, between 9th and 10th sterna. This is called mosaic vision. 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. But they are fused at regular intervals in the thorax and abdomen to give rise to nerve ganglia. Content Guidelines 2. These are a pair of much branched accessory reproductive glands of female. 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. i. Ovaries: These are a pair of gonads; each is termed as ovary which yellowish in colour, and lies on either side of median line embedded in the fat body in 4th to 6th abdominal segments. The reproductive organs are similar to those in cockroaches but are more simplified. Malpighian tubules are the fine, long, unbranched, yellowish and blind tubules attached to the alimentary canal at the extreme anterior end of the hindgut. The Male Reproductive Organs: i. Testes: They are a pair of faintly […] Answer ❤. Mesosternum completely divided and seventh sternum is visible. Hindgut or the proctodaeum is the last part of the alimentary canal. OVARIES ❤. The female reproductive system of cockroach consists of a pair of ovaries, vagina, genital pouch, collaterial glands, spermathecae and the external genitalia. Each ovariole forms one mature ovum at a time. More reabsorption of water takes place in colon and rectum so that more or less solid uric acid is eliminated with faeces through anus. This kind of vision is known as mosaic vision with more sensitivity but less resolution, being common during night and hence called nocturnal vision. The female reproductive system makes its own hormones that help to control a woman's monthly cycle. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle. Abdomen is generally broad (boat shaped) and seventh sternum divided by a opening of genital pouch. Heart → head sinus → perineural sinus → perivisceral sinus → pericardial sinus → heart. They are present in the 6th segment. The haemolymph circulates in the body cavity by the contraction and relaxation of the heart which is assisted by the alary muscles. These gonapophyses act as ovipositor valves. It is situated above the oesophagus almost between the bases of the antennae. The anterior and dorsal margins of the genital pouch are formed by the 8th and 9th sterna respectively while posterior, ventral and lateral margins are formed by the 7th sterna. Earthworms are monoecious or hermaphrodites. Female Reproductive System of Cockroach / Grasshopper. Circulatory System 4. The body of female cockroach is larger. Haemocoel is divided by a dorsal and ventral diaphragms into three blood filled sinuses-dorsal pericardial, middle perivisceral and ventral perineural. The abdomen of female cockroach is boat-shaped and the last segment is blunt. Reproductive System. The perineural sinus or sternal sinus encloses the ventral nerve cord. The male reproductive system has a pair of testes that lie on the lateral side in the 4th -6th abdominal segments. The stomodeal valve prevents the passage of food from midgut into the gizzard. iv. Male Reproductive System; It consists of a pair of testes one lying on each side in the 4-6th abdominal segments. In cockroach, the sexes are separate and there is a distinct sexual dimorphism. Difference # Female Cockroach: 1. Digestive system of cockroach consists of the mouth parts, a long alimentary canal and a pair of salivary glands. This arrangement very well compensates for the inability of blood to transport oxygen due to the absence of a respiratory pigment. The alimentary canal consists of three parts namely: Foregut or the stomodaeum is the first part of the alimentary canal. Anal styles are absent. The seventh abdominal ganglion is the largest which is supposed to be formed by the fusion of three pairs of ganglia. Abdomen is narrow and a seventh sternum undivided. Blood of cockroach is colourless as it has no haemoglobin pigments. The thoracic ganglia give off nerves to the muscles of the legs and wings. 3. are a part of reproductive system of male cockroach and are associated with conglobate gland. The ovaries produce the egg cells, called the ova or oocytes. In addition, fat body cells, uricose glands, cuticle and nephrocytes also help in the process of excretion. They absorb nitrogenous waste products and convert them into uric acid. The terminal filaments of all the ovarioles unite and form a common thread. It is in the form of a short narrow tube which is lined internally by endoderm. Mouth leads into a tubular pharynx from which arises a narrow, thin-walled, short oesophagus. 2. In cockroach there are altogether ten pairs of segmentally arranged spiracles or stigmata of which two pairs are in the thorax and eight pairs in the abdomen. The undigested material is eliminated as faeces through the anus in the form of slender pellets. Morphology- Head , Thorax , Abdomen 4. Female Reproductive System: The female reproductive system of cockroach consists of two large ovaries. From the Malpighian tubule so formed uric acid moves into ileum by gentle peristaltic movement. The tracheoles which are thin and less than 1 micron in diameter end blindly in the tissue cells. Female Reproductive System of Cockroach / Grasshopper. Oviducts: These are a pair of short but wide ducts; each arises from an ovary and extends backwards. Difference between Male and Female Cockroach Cockroaches are found in places where there is a warmth, dampness and plenty of organic food to devour. Privacy Policy3. Each ovariole has a thread like apical prolongation, the terminal filament. The females on average produce an egg case about once a month for ten months laying 16 eggs per egg case. Save my name, email, and website in this browser for the next time I comment. It is situated in the pericardial sinus mid-dorsally beneath the terga of thorax and abdomen. It is terrestrial, nocturnal, cursorial (fast runner), omnivorous and unspecialized insect. The tracheae have cuticular lining called intima or taenidia which form spiral or ring like thickening around the tracheae. This process is called ovulation. Females of the American cockroach lay their eggs in a hardened, purse shaped egg case called an ootheca. Each ovary consists of 8 blind ovarian tubules or ovarioles inside which the linear series of ova are situated in an acropetal order (oldest at base and youngest at tip). The wings of female cockroach are smaller and extend up to the tip of the abdomen. When the alary muscles relax, blood is forced through ostia into the heart. Its function is to receive and store spermatozoa. Reproductive System. The contraction of alary muscles results in the enlargement of pericardial sinus so that blood flows into it from the underlying perivisceral sinus. If the female had continuous food availability it could produce an ootheca every 2-3 days to 30 °C. Respiratory System of Cockroach: The cockroach has a very peculiar and well-developed respira­tory … It is highly specialised for grinding the food. All of this takes place at 30 C, the optimum temperature for growth and reproduction. (2) Sixteen ova, one from each ovariole of the two ovaries, are dischagred at a time into the genital … They run parallel and very close to each other. From the sub-oesophageal ganglion arises a double ventral nerve cord which runs through the thorax and abdomen below the alimentary canal upto the posterior end of the body. Its narrow duct opens into the genital pouch by the side of male gonopore. From the head sinus, blood flows into antennae in head and to wings through veins. As they are laid they become fertilized by sperms ejaculated simultaneously from spermathecae. Situated between the female genital pore and anus inside the genital pouch there are 3 pairs of chitinous plate like structures called gonapophyses. The two spermathecae open by a median aperture in the dorsal wall of the genital pouch, at the tip of a small spermathecal papilla on 9th sternum. The abdominal ganglia innervate dorsal and ventral muscles, heart, spiracles and reproductive organs. The haemocoel of cockroach contains a network of closed, elastic, branched air tubes called tracheae. The apices of these muscles are attached to the terga and their broad bases to the dorsal diaphragm. We show that in the cockroach Nauphoeta cinerea the choosiness of females, defined as the courtship effort females require from males before mating, changed as a function of female age because of age-related changes in the reproductive system. Once in the uterus, the fertilized egg can implant into thickened uteri… 5. The genital pouch can be divided into two parts. Ovariole: it is an elongated egg-tube in which the developing ova are arranged in a linear row in order of development. Classification of cockroach 2. both the sexes have well developed reproductive organs. Ootheca is a dark reddish to blackish brown capsule. Each spiracle is a slit like aperture which is guarded by bristles or hairs to prevent the passage of dirt. The heart consists of 13 funnel shaped chambers. It is endodermal in origin. It is the main site of digestion and absorption. It controls the movements of muscles of mouth parts. The abdominal spiracles are situated one pair in each of the first eight abdominal segments, between the terga and sterna. Fertilized eggs become hardened by the secretion of collaterial glands, which hardens to form an ootheca. They are dropped or glued to a suitable surface, usually in a crack or crevice of high relative humidity near a food source. The nerve cords are solid. 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. Development is direct, the nymphs look very much like adults and life history includes three stages – egg → nymph → adult. The deposited ootheca contains water sufficient for the eggs to develop without receiving additional water from the substrate. The antennae are relatively larger than that of the males. Nymphs are similar to the adult in morphology and physiology but are smaller in size, paler in colour, wingless and sexually immature. The ovaries lie laterally in the 2nd – 6th abdominal segments. It produces the female egg cells necessary for reproduction, called the ova or oocytes. Your email address will not be published. : Reproductive organs of female cockroach. Inside the heart the blood flows unidirectional from posterior end to the anterior end of the body. These hormones cause ova to develop and be released in a monthly cycle. Malpighian tubules are the main excretory organs of cockroach. Opening into the anterior end of the midgut, there are six to eight hepatic caecae (gastric caecae or enteric caecae or mesenteric caecae). Each ovary is formed of a group of eight ovarian tubules or ovarioles. The pulsatile heart of cockroach is a long narrow tube with anterior end open and posterior end closed. The main difference between male and female reproductive system is that male reproductive system produces and delivers sperms to the female reproductive system whereas female reproductive system facilitates fertilization and develops the baby. It is also formed by the fusion of three pairs of ganglia – mandibular, maxillary and labial ganglia. 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. Each chamber communicates with the one in front of it by a valvular opening. They are excretory in function. The sperms are stored in the seminal vesicles and are glued together in the form of bundles called spermatophores which are discharged during copulation. The viscera lie immersed in blood called haemolymph of the haemocoel or body cavity. It consists of a pair of ovaries , oviducts , vagina , spermathecae, colleterial gand... ❤. Female reproductive system: It consists of a pair of ovaries which possess number of ovarioles a pair of oviducts, common oviduct / Median oviduct spermatheca a pair of accessory glands and Bursa copulatrix or copulatory pouch or genital chamber or vagina Digestive System of Cockroach 2. The anterior smaller part containing female gonopore and pores of spermathecae and collateral glands is called genital atrium or genital chamber, while the larger posterior part in which ootheca is formed is called oothecal chamber or vestibulum. A cockroach can receive several images with the help of several ommatidia. The haemolymph does not help in respiration. On an average a female cockroach produces 9-10 oothecae during her life time each containing 14-16 eggs arranged in two rows. At the junction of the midgut and the hindgut there are 100-150 thin, delicate, yellowish thread-like (or hair like) structures called the Malpighian tubules. 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. A pair of large ovaries are present laterally in 2,3,4,5,6 segments surrounded by fat bodies. ii. It includes the mouth, pharynx, oesophagus, crop and gizzard. The secretion of collateral glands helps in the formation of ootheca. Colleterial glands: These are two, asymmetrical, very much branched and tubular glands. The two vasa deferentia, one from each testis, run posteriorly downwards and open into the ejaculatory duct through seminal vesicles. It is ectodermal in origin and lined by a cuticle. Dorsal pericardial sinus encloses heart, aorta and one pair of alary muscles in each segment, one on either side of heart. The ducts of two glands unite to form a common duct, which open on the dorsal side of genital chamber. Furthermore, penis, scrotum, seminal vesicles, vas deferens, prostate, and Cowper’s gland are the structures of the male reproductive system … The major sense organs of cockroach are antenneae, eyes, maxillary palps, labial palps, anal cerci etc. v. Spermatheca: It is a sac or pouch like structure, made up of two slender, spirally coiled tubules of unequal size united to form a short stalk which opens into the dorsal wall of vagina. The first chamber of the heart is continued anteriorly into an anterior aorta which opens into the head sinus. A few species are found in and around human habitat, being pests they destroy food and contaminate it with their smelly excreta. The ventral diaphragm enters the legs so that each leg contains perivisceral and perineural sinuses. Nervous System 6. vi. Reproductive System The reproductive system is well developed in both the male and female cockroaches. Each ovary... ❤. The female reproductive system consists of the following: One pair of yellow coloured ovaries are situated in 2nd to 6th segments, on either side of the hindgut embedded in fat bodies. The genital pouch in male cockroach is situated at the hind end of the abdomen bounded dorsally by the terga of 9th and 10th segments and ventrally by the sternum of 9th segment. 3. ⇨ Anatomy of Earthworm,Cockroach & Frog ⇨ Reproductive System of Earthworm; Reproductive System of Earthworm Anatomy of Earthworm,Cockroach & Frog of Class 11. In response, the sexually excited male raises its forewing and rapidly flutters its hindwings. The perivisceral sinus contains the alimentary canal along with the whitish mass of tissue called fat body. The glandular wall of the ejaculatory duct secretes the covering wall of spermatophore. Female Reproductive Organs of Cockroach: (i) Ovaries:. The supra-oesophageal ganglion and the sub-oesophageal ganglion are connected by a pair of circum-oesophageal connectives or commissures which encircle the oesophagus. These parts function together to do many things, such as producing eggs and hormones, maintaining a … The male reproductive system of cockroach consists of the following: Situated amidst fat bodies between 4th and 6th abdominal segments dorsolaterally there is a pair of three lobed testes. These completely circular cuticular rings keep the tracheae distended and prevent the tracheae from collapsing even if there is no air in them. Thus development of cockroach is simple and direct with little metamorphosis (hemimetabola) and shows gradual metamorphosis or paurometaboly. Before publishing your Notes on this site, please read the following pages: 1. The ducts of two glands unite to form a common duct, which open on the dorsal side of genital chamber. 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The next time i comment the seventh intromittent organ is not present a! Diaphragms are with pores or fenestrae which permit the flow of blood from one to... Ovary unite to form a median common oviduct or vagina in the process of copulation lasts an! Function and structure of the males help of several ommatidia case called an ootheca containing about 12- eggs... Muscular canal that can accommodate the penis thus development of cockroach consists of three pairs of large ganglia in pulvillus..., vasa deferentia, one ventral and one pair between prothorax and mesothorax and the part...

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