Start studying A&P II- Chapter 23: The Digestive System (Memorize question and Answer). iii. Two antennae-like appendages called ‘cerci’ near the tip of the abdomen carry long, thin hairs that are sensitive wind detectors (Figure 2). The adult cockroach is reddish brown in colour. The ileum is narrow; colon broad and slightly coiled, with irregular folds of the lining epi­thelium, covered with a layer of chitin. A large number of eggs per capsule 2. Presence of endocellular symbiotic Blattabacterium; Blattabacterium are common to most cockroaches and are necessary for their survival. Short development period to hatching and maturity 4. (CBSE AIPMT 2005) Millipedes have two pairs of appendages in each segment of the body Cranium. The body of cockroach is narrow, elongated and bilaterally symmetrical. pects in cockroaches, which are suitable models for physi-Eur. Cockroach. They are tactile sense organs. The following points highlight the nine important larval forms found in Crustacea. scorpion. They assist in processing the nitrogen in their diet. “It is going to take all of us to loudly take up the banner of science and make ourselves heard over the din of misinformation.”. 2. The segments of the cockroach leg and its basal parts are shown in Fig. Here, the blood bathes all the visceral organs. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The two are joined by connectives and also connected to a median hypo-cerebral ganglion. Its body is dorsiventrally flattened. there is no formation of cell plate and thus the cell is containing more number of chromosomes as compares to other dividing cells. A semitransparent gland in the mid-ventral position of the prothorax. Cockroach is an almost omnivore but it prefers starchly food. 3. Which of the following digestive enzyme is present in the saliva of cockroach? By Cédric Aria and Jean-Bernard Caron. The junction of the mid and hindgut is marked by 60 to 70 extremely fine, yellowish Malpighian tubules. Abdomen. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Cephalic appendages: Antennules: The protopodite is 3 segmented, with basal structure precoxa.coxa and basis. The coxae appear flattened (as in extant cockroaches)—best shown in the left midleg (figure 2 c), which also displays the trochanter. The larval forms are: ... antennules with discs on which cement glands open, antennae are lost but remaining cephalic appendages are present, thorax has six pairs of biramous limbs, there is an abdomen of four segments. B) Epipharynx done clear. e. The undigested part of the food is passed to the hindgut, where water and salts are absorbed, the residue temporarily stored there and finally egested through anus. The different authors agree but little on the cephalic appendages of the gymnosomatous Pteropoda, and many of them consider all these appendages as tentacles. Cite . NCERT Exemplar Class 11 Biology Chapter 4 Animal Kingdom Multiple Choice Questions Q1. The development of the fins in this position has caused the disappearance of the anterior tentacles. A round, thick- walled, muscular structure, posterior to the crop. The maxillae procure the food, the mandibles cut it into pieces and the food is taken into the buccal cavity. The tracheoles end in tissues. v. The tergum of the tenth segment projects backward as a flexible plate and bears a deep notch at the middle. Functions of Head. 25.25; 25.26): 1. Circulatory System 6. On the basis 2 long,many segmented whip like feelers are present. Each trachea divides and subdivides into numerous branches and the ultimate, very fine branches entering the organs are called tracheoles. Small size, therefore readily conceals itself. The food is crushed by the teeth and the hairy cushions permit only finer food par­ticles pass to the midgut. The pericardium also bears a number of perforations and as a result, the pericardial cavity is in communi­cation with the perivisceral cavity or the haemocoel. It maintains equilibrium of the animal. They are not homologous to exopodite and endopodite. a. a rapid reproductive rate b. the possession of an exoskeleton c. a relatively small size d. a wide variety of appendages e. the ability to fly f. none of the above CEPHALIC NEUROENDOCRINE REGULATION OF INTEGUMENTARY WATER LOSS IN THE COCKROACH PERIPLANETA AMERICANA L. BY JOHN NOBLE-NESBIT ANTD MARWAN AL-SHUKUR* School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ Accepted 4 January 1988 Summary Our experiments show that the brain of cockroaches produces, stores (tempor-arily or otherwise) and … (CBSE AIPMT 2005) Millipedes have two pairs of appendages in each segment of the body It has many adult features. The eighth and ninth terga are hidden from view by being overlapped by the seventh. D. Coxa. Please log in to add an alert for this article. The alimentary canal is divided into three zones: The fore and hindgut are lined by cells of ecto­dermal origin, while the lining of the midgut is endodermal. Paired, given off from the brain and end in the compound eyes and the antennae. The two oviducts unite to form a median chamber, sometimes called the vagina, which opens in the gonopore (vulva) guarded by the gonapophyses on the sternum of the 8th abdominal segment. Three pairs of legs. Solution: The main characteristics of class Crustacea and insecta are as follows: (i) Class Crustacea: Mostly aquatic with gills, two pairs ofjaws, appendages mostly biramous and always more than four in the trunk region.Example : prawn, crab, lobster etc. A large number of eggs per capsule 2. The appendages like a pair of compound eyes, 0-3 ocelli, a pair of antenna and mouth parts are called as Cephalic appendages. 25.25) Function: Sensory. By the successive contraction of the chambers of the heart, haemolymph is driven forward and poured in the haemocoel through the aorta. a. 1. Cellular aggregate level C. Tissue level D. Organ system level i. Pheretima ii. i. Pronatum is a shield-like hard struc­ture present on the dorsal surface of the prothorax. A. A short, narrow tube, extend­ing up to the prothorax and ending in crop. The body is a strong chitinoid structure provided with teeth. So the correct option is D. Answered By . The hepatic caeca presumably se­crete digestive enzymes. Cellular aggregate level C. Tissue level D. Organ system level i. Pheretima ii. In this essay we will discuss about:- 1. Fertilization and Development. Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature? NCERT Exemplar Solutions of Class 11 Biology Chapter 4 Animal Kingdom. b. A median ganglion, just in front of the brain and connected to it by two bilateral connectives and sends a recurrent nerve posteriorly to the visceral ganglion on the dorsal surface of the crop. Each vas deferens, before uniting with its fellow of the opposite side, dilates a little forming a seminal vesicle, from which arise a large number of blind pouches and the whole arrangement is known as mushroom gland. Here we have given NCERT Exemplar Class 11 Biology Chapter 4 Animal Kingdom. The nervous system comprises of central nervous system, peripheral nervous system and visceral nervous system (Fig 25.32): It consists of a brain or supraoesophageal ganglia, sub-oesophageal ganglia, circumoesophageal connectives and a double ven­tral nerve cord with ganglia. A pair of thick, opaque, brown plates, the elytra or anterior wings are attached to the anterior border of the tergum of the mesothorax. Photoreceptors, mechanoreceptors, thermo receptors and chemoreceptors constitute sense organs. - Jointed appendages Which of the following are examples Of Arthropoda? 25.25; 25.26): Each antenna is long, slen­der and many-jointed (Fig. 25. In the precoxa a statocyst is present. i. External Features of Cockroach 2. They would be a differentiation of the internal wall of the buccal cantys which is prodnced behind the buccal appendages. The cephalic appendages give rise to the extrabranchial cartilages and postoccipital appendages. basal sclerites of the following segment; an extra leg is formed. In the Thecosomata we find a pair of rudimentary tentacles, for example, in Hyalaea, Cleodora, and Creseis, 1 Cuvieria and Spirialis,2 Tiedemannia3 and Cymbulia.4, With several of these animals the tentacles present rudimentary eyes, Creseis for example.5, If they do not present eyes in the adult state they possess them in some stage of the development, as in Tiedemannia and Spirialis.6. Which of the following is part of an appendage? In this manner we see that with Clione, as with Pneumodermon and Cirrifer, the buccal appendages are inserted on the internal wall of the buccal cavity. The different authors agree but little on the cephalic appendages of the gymnosomatous Pteropoda, and many of them consider all these appendages as tentacles. 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