Write two characteristic points about the structure of each of them. (iii) Columnar: Composed of a single layer of tall and slender cells. The Nervous System and a Cockroach By: Cassidy Widlowski. In a cockroach, the nervous system is spread throughout the body. Striated muscles are present near articulatory joints. Question 5. Blood vascular system: Pheretima exhibits a closed type of blood vascular system consisting of blood vessels, capillaries and heart. II. Free surface may have microvilli. Answer: Brain is formed by the fusion of a pair of cerebral ganglia, it lies in the anterior and dorsal part of the third segment. There are 10 pairs of spiracles of which two pairs are located in the thorax and eight pairs in the abdomen. Answer: II and III only. Answer: For example, the antennal nerve carries, . Answer: (i) Striated muscles. Answer: (d) Maxilla; mandible; labrum; antenna Mention the function of the following. What is pscudostratified epithelium? It is usually experienced as a change in the stimulus. Sensory inputs have, Learning, Memory and Intelligence in Insects, Although the mushroom bodies of the brain have been shown to be involved in learning, ganglia other than the brain are, . (iv) How many segments are present in the abdomen of cockroach? Pharyngeal nephridia: present as three paired tufts in the 4th, 5th and 6th segments. Answer: Hildebrand, 1989. Answer: Simple epithelium is composed of one layer of cells while compound epithelium is composed of more than one layer of cells. ADVERTISEMENTS: In this article we will discuss about the Circulatory System in Cockroach:- 1. The network of neurons acts as a central pattern generator.It is a model system for motor pattern generation because of the small number of cells, which are comparatively large and can be reliably identified. 1st PUC Biology Structural Organisation in Animals Two Marks Questions. Answer: The thoracic ganglia give out nerves to the muscles of legs and wings and abdominal ganglia give out nerves to abdominal muscles, heart, spiracles & reproductive organs. Liver secretes bile into duodenum. (v) Where do you find Malpighian tubules? The ureters act is urinogenital duct which opens into the cloaca. b – (iv) Tendon. Name any 2 species of cockroach? An isolated cockroach leg exhibits another phenomenon related to learning - sensory habituation. Name the type of connective tissue that serves as a support framework for epithelium. Answer: Question 4. (D. Kannada 2006) The nervous system of cockroach is spread throughout the body. It is located in trachea and bronchi. Midgut- It is also known as mesenteron or ventriculus. (iii) What is the position of ovaries in a cockroach? What are mandibles? 3 types of nephridia. and J.G. In nonmyelinated axons, the wrapping may be a simple sheath, , which folds tightly around the axon several times, except at exposed, http://www5.pbrc.hawaii.edu/~danh/InvertebrateMyelin/, http://casas-lab.irbi.univ-tours.fr/Circadian%20rhythms%20in%20insects.pdf. (i) What is the function of nephridia? Answer in one word or one line. This is one of the reasons why a headless roach can live for more than a week. (D.Kannada 2005) d – (ii) Answer: Answer: They are embedded in the epidermal pits in the middle of each segment. Answer: Blood is the fluid connective tissue. Peristomium is from where the true segment of the earthworm body starts. The supra-oesophageal ganglion or cerebral ganglion is a bilobed structure situated in the head in front of oesophagus, above the tentorium and almost between the bases of the antennae. Circulating Fluid in Cockroach 3. Answer: circum – oesophageaÌ connectives and double ventral nerve cord (see figure). Why is cockroach called an omnivorous animal? The muscle layers help in locomotion. The glands which do not have ducts and pour their secretions directly into the blood are called endocrine glans. Answer: Spiracles are the openings of the respiratory system (trachea) in cockroach. They produce blood cells and haemoglobin which is dissolved in blood plasma. (b) RBC; WBC; platelets; cartilage Respiration by skin is known as cutaneous respiration. The jaws of cockroach are called mandibles. What are spiracles? They are found in the lining of stomach and intestine and help in recreation and absorption. Autonomic neural system transmits impulses from CNS to involuntary organs and smooth muscles. Integumentary nephridia: attached to lining of the body wall of segment 3 to the last that open on the body surface. (d) Open circulatory – (iv) Mosaic vision In the head region, only a little bit of the nervous system is present while the majority is situated on the ventral side of the body. Question 3 In addition to learning routes, insects can, a type of digger wasp, which brings back food to its developing young in the nest, the wasp. occurs when a stimulus, irrelevant by itself, is made relevant by pairing it with something meaningful, . They absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut. These fibrous proteins provide strength, elasticity and flexibility to the tissue. Answer: In the locust, the HG sends out one pair of outer oesophageal nerves (and one pair of inner. What do fibroblasts synthesize? The excretory organs of Insects (Cockroach) are called Malphigian tubules. Cockroach feeds on all kinds of substances like leather, paper, cloth etc., hence called omnivorous. Where are they attached to the body? (c) Dense regular and dense irregular connective tissues When an insect has just completed a task, learning is abolished if a new task is, Hard to say. Three types of nephridia are found. The supra-oesophageal ganglion supplies the nerves to antennae and compound eyes. What are endocrine glands? Fat bodies and nephrocytes are subsidiary organs of excretion. Cockroach. Mention the function of the following. Cilia help trap and clear dust foreign particles. (b) Cardiac muscle and striated muscle Coxa is not part of thorax. (iv) Labium: The labium or lower lip lies behind the maxillae. Their nuclei are located at the base. Smaller blood vessels supply the gut, nerve cord and the body wall. Three ganglia lie in the thorax, and six in the abdomen. With the help of a neat labelled diagram Explain the nervous system of cockroach. Describe the nervous system of an earth-worm. Answer: (Belgaum 2004) Why are striated muscles called Skeletal muscles? Labrum, Mandible, hypopharynx, manillary palp (cardo, stipes, lacinia, galea) submentum, mentum, prementum, glossa, paraglossa, labial palp. Name the tissue which connects muscles to a bone. Question 15. Question 17. Sub oesophageal ganglia:- are a pair of ganglia the oesophagus. In dense regular connective tissues, the collagen fibres are present in rows between many parallel bundles of fibres. They collect the nitrogenous wastes from the haemolymph and send them into the intestine. Question 25. (i) Labrum: This is also known as upper lip. Simple gland is composed of single-cell while compound gland is composed of multiple cells. Digestive and Excretory Systems . Answer: Dissection of Reproductive System. Answer: Draw a neat labelled diagram of the digestive system of cockroach. The digestive system mainly consists of the foregut, midgut and hindgut. The nervous system comprises of central, peripheral and sympathetic nervous system. The AL receives inputs from the third (terminal) antennal segment (the flagellum, which is, (singular glomerulus). Answer: Question 10. Mechanism. Answer: Answer: The head of cockroach holds a bit of a nervous system while the rest is situated along the ventral part of its body. Functional diagram of the synthetic nervous system used for one leg. Question 4. ROLE OF CARDIAC NEURONS IN THE COCKROACH HEARTBEAT 1267 1 A4 FIG. (c) Body wail an earthworm This paralyzes the front legs of the cockroach. (b) Septal nephridium and pharyngeal nephrldium A cockroach will respond to a tactile or wind stimulus directed at the body by rapidly turning away from the stimulus and running. The hindgut is differentiated into an anterior short, narrow ileum, middle long wide coiled colon and a terminal short dilated sac like structure the rectum which opens to the exterior by anus. Answer: (b) Malphlglan tubules Mention the cell types in it. Nephridia regulate the volume and composition of the body fluid in the earthworm. Write four functions of bones. Answer: Write the scientific name of cockroach. Question 6. Question 12. This is not called a true segment as it doesn’t contain typical organs of an annelida. Since striated muscles are attached to the bones, they are called skeletal muscles. Where are blood cells manufactured in the bone? Actin and Myosin filaments. Answer: Name the larva of a frog. The mentum posses a pair of labial palps. Crop is thin-walled sac, present in the whole of the thorax and serves as a reservoir for food storage. It consists of proximal submentum, middle mentum and distal bilobed prementum. Question 11. The salivary receptacujar duct opens behind the tongue. Question 1. Answer: (b) Compound eye – (ii) Cockroach Give reason. Nephridia is the excretory organ of the earth worm or pheretima. Answer: Question 6. A double ventral nerve cord runs up to the last segment. Ten pairs. What is tergum? Question 21. It has sensory/receptor cells. What is the main role of setae in an earthworm? (c) Septal nephrldla – (iii) Skin Chondrocytes. Answer: I and III only. (c) Exocrine; endocrine; salivary gland; ligament Sense organs include a pair of compound eyes, thigmoreceptors, chemoreceptors, auditory receptors and proprioreceptors. How does a frog take in water? : Tendon, It is a solid, rigid and strong connective tissue, It is a solid, semi-rigid and flexible connective tissue, Occur in clusters of 2 or Â 3 in each lacuna, Matrix is deposited with salts of calcium and phosphorous. The body wall of earthworm is covered externally by a thin noncellular cuticle below which is the epidermis, two muscle layers and an innermost coelonic epithelium. Name two kinds of filaments of microfibrils. Foregut- It is also known as stomadaeum and is divided into buccal chamber, pharynx, oesophagus, crop, and gizzard. Home Decorating Style 2020 for Nervous System Of Cockroach Pdf, you can see Nervous System Of Cockroach Pdf and more pictures for Home Interior Designing 2020 89957 at Manuals Library. However, much of their nervous system activity takes place in nerve ganglia located throughout their bodies. The hindgut/proctodaeum is a long tube like structure with 60 – 70 narrow thread like yellow structures called Malpighian tubules. Answer: I. Somatic neural system relays impulses from CNS to skeletal muscles. Mention any two differences between male and female cockroaches. (e) Simple gland and compound gland It is the main organ of digestion and absorption. Sarcomere. Answer: Answer: (g) Genitalia – (vii) Bone These are thought to function as higher centres, receives inputs from the mushroom bodies and integrates, which send their axons to the pair of corpora cardiaca (see the, Another function associated with the protocerebrum is time-keeping. Answer: They are S-shaped. Question 10. The inner surface of the labrum bears taste buds concerned with tasting of the food material. 2 large ovaries are found lying laterally in the 2nd to 6th abdominal segment. They have toothed inner edge helps in biting the food materials into small pieces. What is their shape? (f) Osteocytes – (vi) Phallomere Name two groups of animal that have it. What is meant by cutaneous respiration? Malpighian tubules are the main excretory organs of the cockroach. Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last open into intestine. Answer: Two. Answer: The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. Question 2. Their role is to facilitate movement of organs like hands and feet. 05,08, U.Kannada 08, D.K. The nervous system of cockroach consists of a series of fused, segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side. Write three differences between bone and cartilage. (B’lore South, B’lore North 2004) Question 9. What is their functions? (a) Chondriocytes Epithelial tissues provide covering to the inner and outer lining of various organs. Insect activity is timed with the daily light/dark cycle - the, ('ciracdian' means 'about a day', the exact time being set each day according to environmental cues such, or time-givers) such as the number of hours of light and dark. Answer: Tail like structure of a neuron. It consists of ileum, colon, rectum. Circum oesophageal Connectives:-These are thick ends of nervous tissue arising from the base of the brain and called commissures. Found in the inner lining of bronchioles. Name any two secretions of them. Setae:-Their principal role is locomotion. The epidermis is made up of a single layer of columnar epithelial cells which contain secretory gland cells. (c) The body wall of earthworm Each maxilla is differentiated into a basal segment consisting of cardo and stipes, terminal segment consisting of outer larger part called galea and inner stouter part called lacinia. This is commonly found in ducts of glands and tubular parts of nephrons in kidneys and its main functions are secretion and absorption. Integration is the sorting and evaluation of information. The head holds a bit of a nervous system while the rest is situated along the ventral (belly-side) part of its body. Many of the nerves of the peripheral nervous system or pns branch out from the spinal cord and travel to various 1st PUC Biology Structural Organisation in Animals Five Marks Questions. Antenna is not a masticating part of cockroach. Due to closed circulatory system, blood is confined to the heart and blood vessels. It synthesises, stores and metabolises fat. The first sting targets the first thoracic ganglion, part of the central nervous system. Answer: Insect - Insect - Circulatory system: The circulatory system is an open one, with most of the body fluid, or hemolymph, occupying cavities of the body and its appendages. Save my name, email, and website in this browser for the next time I comment. Explain the nervous system of cockroach. (Mandya 2005) 1st PUC Biology Structural Organisation in Animals Three Marks Questions, Question 1. Insects certainly exhibit circadian cycles. Answer: Question 8. What are the three types of muscle tissue? Periplaneta americana (Kolar 2005). Answer: Answer: g – (vi). how to draw respiratory system of cockroach. Question 16. Question 1. They have contractile property which helps in”the pumping action of the heart. Question 23. Question 1. Answer: (ii) How many types of nephridia are found in the earthworm, based on their location? Cardiac muscle are present in the cells of heart only. This tissue is present in the skin. It serves as a support framework for epithelium. 2. 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