The life cycle from egg to adult averages about 600 days, and the adult life span may be another 400 days. The body of the cockroach is compressed dorsoventrally, bilaterally symmetrical, segmented and is divisible into three distinct regions head, thorax and abdomen. Dec 26, 2019 read along to know more about the external morphology and internal anatomy of a cockroach which belongs to the phylum arthropoda. Free online external morphology of cockroach practice. The external morphology and phylogenetic position of the. Jan 30, 2017 diagram of the external anatomy of a typical insect read pdf. Habit, habitat and morphology of a cockroach gulpmatrix. American cockroach, periplaneta americana linnaeus insecta. It is quite slimy to touch and appears brown due to the presence of porphyrin pigment in its body wall.
The body of the cockroach is elongated and segmented. Neet ug biology cockroach comparative study mcqs, multiple. Biology champ morphology and anatomy of cockaroach. Cbse ncert notes class 11 biology structural organisation in. Body elongated, rounded, narrow, bilaterally symmetrical and cylindrical. Students will learn external morphological characteristics used to identify hexapods in common morphology based keys. Each of the three pairs of legs is named after the region of the thorax to which it attaches. Aug 03, 20 of the largest species of cockroach, reaching 5. In the follwing diagram of a leg of cockroach parts have been indicated by alphabets. Neet zoology structural organisation in animals questions solved. The head and thorax are joined together by a soft area. Cockroaches can skitter an average of 20 to 40 cm per second.
Crop has an outer layer of thick circular muscles and thick inner culicle forming six highly chitinous plate called teeth. Sanchez, the nature and development of sex attractant specificity in cockroaches of the genus periplaneta. The cephalic morphology of the american cockroach periplaneta americana blattodea. Classification phylum arthropoda class insecta one or two pairs of wings attached to the thorax order dictyopterainsects with filiform antenna with many segments family blattidae folding of hind wings, spines in femor genus periplaneta species americana. Pdf the skeletomuscular system of the head of the american cockroach periplaneta americana is described in detail. Morphology and anatomy of cockroach in this section, you will delve a bit further to examine the morphology and anatomy of cockroach. Suiter, university of georgia, university of florida mandibulate chewing mouthparts are used for biting and grinding solid foods see diagram above. Students will learn general hexapod internal and external morphology sufficient for them to perform entomological techniques that require finding, analyzing and using common hexapod organs.
Ent 4015 ornamentals and turf entomology insect morphology. They have an elongated and dorsoventrally flattened body. The prothoracic legs are closest to the cockroach s head. Jan 01, 1995 external morphology of antenna and their sense organs in the roach gromphadorhina brunneri blattodea.
Insect morphology is the study and description of the physical form of insects. The evolutionary flexibility of the four mouthpart segmental appendages is the theme of the mouthpart segment of this series. This is a series of metameres that together comprises the exoskeleton. It can be killed successfully by drowning in water. In this article we will discuss about the dissection of cockroach. Wings on males cover only part of the abdomen leaving 3 to 5 abdominal segments exposed and wings on the female are.
Few people realize the extent of cockroach diversity in life history, habitat, behavior, and morphology. These are the shortest legs, and they act like brakes when the roach runs. Differentiate between male and female cockroach on the basis. Blattidae 3 life cycle the american cockroach has three life stages. The mesothorax gives rise to the first pair of wings, while the. External morphology of antennae and their sense organs in.
Sexual dimorphism in the distribution of antennal sense organs in five species, journal of morphology, 149, 2, 9157, 2005. Give an account of respiratory system of cockroach. The head and thorax are connected by prothorax, which is a short extension known as the neck. The others have been brought in by trading ships, mainly in the seventeenth and eighteenth centuries. It contains the body fluids and affords protection from desiccation and predators. Contents introduction classification of cockroach external features head thorax abdomen conclusion references acknowledgement 3. The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Wings extend beyond the tip of the abdomen in males. In each segment, the exoskeleton has hardened plates. A cockroach has three main body parts, namely the head, thorax, and abdomen. Read along to know more about the external morphology and internal anatomy of a cockroach which belongs to the phylum arthropoda. Cockroaches are pests inhabiting the unhygienic and damp places.
Periplanata americana, a common species of cockroach. The entire body is covered by a hard, brown coloured, chitinous exoskeleton. Unspecified grooming behavior of cockroaches is mentioned by. Pdf the skeletomuscular system of the head of the american cockroach. They are from the island of madagascar off the african mainland.
Three physical features separate insects from other arthropods. The exoskeleton is thick and hard made up of calcareous plates called sclerites. The whole body is covered by a brown coloured hard exoskeleton which is made up of chitin. External characters of cockroach for animal sciences students and teachers. Stimulating cockroaches on their antennae or cerci feelers on their backsides makes them move faster. The antennae of male cockroaches are smaller than that of the females. Neet zoology structural organisation in animals questions. Much of the terminology used herein is that of michener 1944a. The fore wings are mesothoracic and are called wing covers or tegmina or elytra. Blaptica dubia serville commonly known as the dubia cockroach, guyana spotted cockroach, or orangespotted cockroach is a large up to ca. Search result for external morphology of cockroach. Blattidae 4 caulking of penetrations through ground level walls, removal of rotting leaves, and limiting the moist areas in and around a structure can help in reducing areas that are attractive to these cockroaches.
After each molt, the cockroach has a pale appearance but regains it dark color shortly thereafter. Few books exist on the ecology, life history, and biology of cockroaches other than those that are closely associated with humans. The body of the cockroach is segmented and divisible into three distinct regions head, thorax and abdomen. External morphology of bees adult bees the sections dealing with the morphological termi nology used in this series of studies are presented not as definitive treatises on bee morphology, but as guides to those structures having taxonomic significance. The body is segmented into three distinct regions, viz. The eye is often prominent and the mouthparts can seem strange to us. As an arthropod, the body of a cockroach is divisible into three distinct regions. Dragonflies and damselflies order odonata, termites order isoptera, adult lacewings order neuroptera, beetles order. Farmers generally expressed views similar to those of the general public kellert, 1993, p. External morphology of insects for greater detail see morphology the insects body is composed of metameres. Chapter ii external structure of common insect cockroach jnkvv. Oriental cockroach blatta orientalis linnaeus diagnostic morphology adults. Differentiate between male and female cockroach on the basis of external morphology.
The study of form and function insects are arthropods. It also has a hard outer body covering known as the exoskeleton. Morphology of cockroach class eleven biology excellup. The adults of the common species of cockroach, periplaneta americana are about 3453 mm long with wings extend beyond the tip of the abdomen in males. The common cockroach is scientifically known by the name periplaneta americana. Differentiate between male and female cockroach on the. It is probably the most loathed about insect ever present. Explore the morphology and anatomy of cockroach byjus. The study of the external morphology of the insects body is helpful in. The abdomen of the female cockroach is boatshaped and blunt. External morphology of antennae and their sense organs in the. It is quite slimy to touch and appears brown due to. Tick mark the statement which is not correct with respect to cockroach.
The whole body is covered by a brown coloured hard exoskeleton which is made up of. With the help of neat labelled diagram, explain circulatory system in cockroach 5. Give an account of the nervous system in cockroach. The cockroach is a bilaterally symmetrical and metamerically segmented animal. The adults of the common species of cockroach, periplaneta americana are about 3453 mm long with wings extend beyond the tip of the. Read along to know more about the external morphology and internal anatomy of a cockroach which belongs to the phylum arthropoda it is probably the most loathed about insect ever present. Morphology and anatomy of cockroach class xi biology. The common cockroach internal anatomy and physiology page 1 of 18. To study specializations and adaptability of structures such as the mouthparts, antennae, legs, wings and pronotum. It also has a hard outerbody covering known as the exoskeleton. Biology 79 exercise 14 frog the following external features may be observed in the model.
But the fact remains that cockroaches have inhabited the earth for the past 300 million years and continue to be present on earth. Common indian species of cockroach periplaneta americana wings in male p. Pdf microbiology of cockroaches a public health concern. Cbse ncert notes class 11 biology structural organisation. A contribution to the morohology of the abdominal appendages of hexapods. They are dark brown in colour belonging to the phylum arthropoda, the blattidae family, and class insecta. Six species of cockroach, belonging to four genera, occur in great britain. Body tagmata of cockroach are head, thorax, and abdomen. The adult cockroaches are about 2 to 4 cm in length and about 1cm in width. The anterior end pointed while the posterior end blunt.
The cockroach has three pairs of jointed appendages and two pairs of wings. Segmented bodies paired, segmented appendages bilateral symmetry exoskeleton dorsal heart and open circulatory system ventral nerve cord. The body is clearly divisible into head, thorax and abdomen and is conspicuously flattened. External insect morphology 315 fleas, moths, and spiders.
Periplaneta americana is the common species of cockroach. Looking at a cockroaches that has molted a while ago, it can easily be mistaken for an albino. For first year, we had dissection of cockroach and frog, which requires dissection. Pdf the cephalic morphology of the american cockroach. Free online external morphology of cockroach practice and. The entire body is covered by a hard chitinous exoskeleton. Adult stage the entire life cycle of a cockroach from the egg to the adult stage can last up to 600 days. Choose the answer in which these alphabets have been correctly matched with the parts of which they indicate, 1 a coxa, b tibia, c tarsus, d femur, e trachanter. Sensilla on the maxillary and labial palps of the cockroach. A female cockroach is larger in size compared to a male cockroach. American cockroach, periplaneta americana linnaeus. Grasshoppers and cockroaches drawings are often used to illustrate the most basic form of the insect head. External morphology the body of cockroach is reddishbrown in color. Form and function of the adult mosquito body adult mosquitoes, like other insects, have three body regions.
181 594 812 359 1438 1336 1095 1515 572 857 953 453 1015 1105 926 1318 194 1317 997 824 902 583 711 1070 80 1503