4/7/2023 0 Comments Cockroach simulator female![]() ![]() In a cockroach, the nervous system is spread throughout the body. ![]() The thorax region has three ganglia and the abdomen has six ganglia. Nervous Systemįused ganglia that are segmentally arranged make up the nervous system of this insect. Exchange of gases takes place by diffusion. The spiracles are regulated by the sphincters. Thin tubes carry oxygen from the air to all the parts of the body. They open through 10 pairs of spiracles that are present on the lateral side of the body. In cockroach, the respiratory system has a network of the trachea. This elongated tube which is the heart of the cockroach has many funnel-shaped chambers and lies mid-dorsally in the abdomen and thorax.īlood Vascular System (Source – Biology Discussion) Respiratory System An elongated tube with a muscular wall regulates the blood in the hemocoel. The hemolymph is made of a colorless plasma and hemocytes. These visceral organs are bathed in hemolymph which is the blood of a cockroach. There is an open space called the hemocoel into which the visceral organs are located. The hindgut opens outside through the anus.Īn open blood vascular system is found in a cockroach as the blood vessels are poorly developed. ![]() These Malpighian tubules help in the removal of excretory products. At the junction of the foregut and midgut, there is a ring of tubules called the gastric caecae, which secrete digestive juice.Īnother ring of 100-150 yellow coloured thin filamentous Malpighian tubules is present at the junction of the midgut and hindgut. It helps in grinding the food particles due to the presence of six chitinous plates called teeth. The gizzard is the next structure that is present after the crop. The oesophagus opens into a sac-like structure called the crop that stores food. The mouth leads into a pharynx which leads into a narrow passage called the oesophagus. The three parts into which the alimentary canal is divided are the foregut, midgut, and hindgut. Body Anatomy of Cockroach Alimentary Canal Learn more about Morphology and Anatomy of Frog here. The 10 th segment has a filamentous structure called the anal cerci, in both male and female cockroach. The male cockroach has thread-like anal styles, which are missing in the female cockroach. In males, the genital pouch is present at the hind end of the abdomen. The 7 th, 8 th and 9 th sterna form a genital pouch in females. The tegmina are dark and cover the hind wings, which are membranous, transparent and used in flight. The first pair of wings called the tegmina comes out from the mesothorax and the second pair comes out from the metathorax. Each segment of the thorax has a pair of walking legs. The thorax is further divided into prothorax, mesothorax, and metathorax. There is also flexible lobe called the hypopharynx that acts as a tongue. The head also has appendages that bear similarity to the mouthparts, such as labrum, a pair of mandibles, a pair of maxillae and a labium. The antennae monitor the surrounding environment with the help of the sensory receptors. In front of the eyes, membranous sockets are present, out of which two antennae protrude out. A pair of compound eyes is present on the head. The head shows great mobility due to the presence of a flexible neck. It is formed by the fusion of six segments. The head of the cockroach has a distinct triangular shape. The male species are longer in length while the females are slightly smaller than the males. A cockroach is a dioecious animal, with separate male and female sexes. The hardened plates of the exoskeleton are called the sclerites. There is a hard exoskeleton that is brown n color, made of chitin. As an arthropod, the body of a cockroach is divisible into three distinct regions. ![]()
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