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| Cockroach - A Representative Arthropod |
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| Kingdom : Metazoa |
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| Subkingdom: Eumetazoa |
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| Division : Bilateria |
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| Grade : Eucoelomata |
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| Phylum : Arthopoda |
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| Class : Insecta |
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| Order : Orthoptera |
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| Family : Blattidae |
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| Genus : Periplaneta |
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| Species : americana |
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| Cockroach |
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| External Features : Perplaneta americana is one of the several species of cockroaches that inhabit our country. Generally cockroaches are among the most common house hold insects. |
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| Cockroach is a nocturnal, omnivorous animal. It feeds on any kind of organic matter. |
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| Cockroach has a dorso ventrally flat, compressed body which is covered by a hard, chitinous exoskeleton. It is in the form of separate plates. The dorsal plate is called tergum and the ventral plate is called sternum. Laterally the plates are joined by pleura. |
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| The segmented body is divided metamerically into segments. Three regions can be recognised in the body, namely a head, a thorax and an abdomen. |
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| The head is a region formed by the fusion of six embryonic segments covered by very hard exoskeletal plates called sclerites. The head is triangular in shape and it is held at right angles to rest of the body. The head bears a pair of compound eyes, a pair of antennae, a mouth terminally and a group of appendages collectively known as mouth parts (trophi). |
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| The Thorax is formed by three independent segments : prothorax, mesothorax and metathorax. Each thoracic segment bears a pair of walking legs on the ventral side. Dorsally, the mesothorax and the metathorax bear each, a pair of wings. The anterior pair of wings, called forewings are used as wing covers for the posterior pair of wings called hindwings, which are used for flight. |
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| The abdomen consists of 10 segments. |
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| External Features of a Cockroach |
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