what is morphology of cockroach. explain in detail
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Morphology of Cockroach
As an arthropod, the body of a cockroach is divisible into three distinct regions. They are the head, thorax, and abdomen. There is a hard exoskeleton that is brown n color, made of chitin. The hardened plates of the exoskeleton are called the sclerites. A cockroach is a dioecious animal, with separate male and female sexes. The male species are longer in length while the females are slightly smaller than the males.
The head of the cockroach has a distinct triangular shape. It is formed by the fusion of six segments. The head shows great mobility due to the presence of a flexible neck. A pair of compound eyes is present on the head. In front of the eyes, membranous sockets are present, out of which two antennae protrude out.
The antennae monitor the surrounding environment with the help of the sensory receptors. 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. There is also flexible lobe called the hypopharynx that acts as a tongue.
The thorax is further divided into prothorax, mesothorax, and metathorax. Each segment of the thorax has a pair of walking legs. The first pair of wings called the tegmina comes out from the mesothorax and the second pair comes out from the metathorax. The tegmina are dark and cover the hind wings, which are membranous, transparent and used in flight.
The abdomen is made up of 10 segments. The 7th, 8th and 9th sterna form a genital pouch in females. In males, the genital pouch is present at the hind end of the abdomen. The male cockroach has thread-like anal styles, which are missing in the female cockroach. The 10th segment has a filamentous structure called the anal cerci, in both male and female cockroach.
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Explanation:
A cockroach has three main body parts, namely the head, thorax, and abdomen. It also has a hard outer-body covering known as the exoskeleton. This exoskeleton is composed of two compounds – cuticulin and chitin. Its function is to provide attachment to muscles and protect the internal organs.