The mouthparts also include Labrum, Mandibles, and a pair of firstmaxillae, labium, and hypopharynx. The 'primitive' arrangement of mouthparts is seen in the cockroach - here they are used for biting. Labrum - a cover which may be loosely referred to as the upper lip. The mandibles are caudal to the labrum and anterior to the maxillae.Typically the mandibles are the largest and most robust mouthparts of a chewing insect, and it uses them to masticate (cut, tear, crush, chew) food items. Uvula This biting and chewing type of mouthparts are considered as the most primitive and unspecialized of all the mouthpart types. Cockroaches have salivary glands as well as an esophagus for easier digestion. Describe the physiology of digestion in cockroach? What are different excretory organs in Periplaneta? • Opisthognathous. However, much of their nervous system activity takes place in nerve ganglia located throughout their bodies. Over many eons of time, tissues and appendages near the mouth opening came to be adapted for gathering and manipulating bits of … Upper lip. A Nauphoeta Cinerea has salivary glands with 4 types of cells that include the central cells, peripheral cells, non-secretory duct cells, and secretory duct cells. Mouthparts directed forward. The peripheral cells have the ability to move ions and water into the glands. Significance to Humans: Though some are considered pests (cockroaches), many are beneficial (praying mantis) preying on other pest insects. Mandibles with toothed edges for chewing. Describe the process of excretion in detail Mouthparts directed backward. 58. Roaches' heads house their eyes, antennae and mouthparts. https://biology4isc.weebly.com/morphology-and-anatomy-of-cockroach.html 56. cockroaches, mantids, phytophagous beetles). A chewing insect has a pair of mandibles, one on each side of the head. The mouth part of cockroach shown in the given diagram acts as a/an: 1. Draw a neat labeld diagram of the mouthparts of cockroach? 3. Describe the process of blood circulation inPeriplaneta? Draw a neat labeled diagram of the salivary apparatus of cockroach? A drawing of the external features of one pair of the wings of the cockroach. Labrum (upper lip) Hypopharunx; Anterior view of the head of a cockroach. Tongue. Common in hemipteroid orders with sucking mouthparts. Mouthparts The ancestors of present-day insects were probably worm-like arthropods with a simple mouth opening near the front of a bilaterally symmetrical body. 59. 2. 57. There are five different structures which are used for the initial collection and processing of food:-What are the different parts for? Has 5 mouth parts, maxilla with long jointed maxillary palps, for holding food. Metamorphosis: They undergo incomplete (simple) metamorphosis with the nymphs looking like small versions of the adults (with underdeveloped wings). 4. The mouthparts of cockroach are biting and chewing type. 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