similar with chordata and echinodermata
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Echinoderms possess a water-based circulatory system. The madreporite is the point of entry and exit for water for the water vascular system. The characteristic features of Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
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Similarities Between Echinoderms and Chordates
Also, both are deuterostomes whose blastopore develops into the anus. And, both exhibit radial cleavage, which is indeterminate. Moreover, they develop through three germ layers. They develop a true body cavity known as coelom.
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