Jointed legs are present on their body and thus they are named as arthropoda (arthro means jointed and poda means foot). These animals have versatile habitat and are found in air, water and on land. The bodies of these animals are also segmented but these segments are external. Their bodies are covered with the hard shell made up of chitin, forming and exoskeleton.
Common examples are prawn, crab, spider, scorpion, centipede, millipede and insects. One third of this phylum consists of insects. Their bodies externally divided into three segments head, thorax and abdomen. In addition three pairs of legs and two pairs of wings are also present; which help them in flying. Two prominent antennas are present on head. Examples are butterflies, house fly, mosquito, grass hopper etc. Some arthropods posses four pairs of legs on their body as spider, scorpion etc. Some arthropods are worms with elongated body. Their bodies are divided into many segments.
Each segment has one or two pairs of legs for example millipede, centipede. Arthropods pass through various stages of development before they reach their adult stage by the process of metamorphosis. This process is of two types; (I) Complete Metamorphosis (ii) incomplete metamorphosis. Complete metamorphosis is the process can be observed in the life cycle of house fly, mosquito, butterfly etc. There are three stages of incomplete metamorphosis and these are egg, nymph and adult animal.
Common examples are prawn, crab, spider, scorpion, centipede, millipede and insects. One third of this phylum consists of insects. Their bodies externally divided into three segments head, thorax and abdomen. In addition three pairs of legs and two pairs of wings are also present; which help them in flying. Two prominent antennas are present on head. Examples are butterflies, house fly, mosquito, grass hopper etc. Some arthropods posses four pairs of legs on their body as spider, scorpion etc. Some arthropods are worms with elongated body. Their bodies are divided into many segments.
Each segment has one or two pairs of legs for example millipede, centipede. Arthropods pass through various stages of development before they reach their adult stage by the process of metamorphosis. This process is of two types; (I) Complete Metamorphosis (ii) incomplete metamorphosis. Complete metamorphosis is the process can be observed in the life cycle of house fly, mosquito, butterfly etc. There are three stages of incomplete metamorphosis and these are egg, nymph and adult animal.
