Solution: Phylum arthropod consists of animals with jointed appendages. These invertebrates have exoskeleton, segmented bidy and paired appendages which are jointes as mentioned earlier. These highly specialized group of animals exhibit bilateral symmetry and open circulation. Regarding the body tissues of arthropoda, they have cuticular covering, whic is made up of non-chitinous epicuticle and chitinous pro-cuticle. The pro-cuticle contains abundance of a tough polymer chitin. Many pharmaceutic industries exploit chitins from marine arthropods for the preperation of different medicine formulations.
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