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1)Bilaterally symmetrical
2)Body has more than two cell layers, tissues and organs. 
3)Body cavity is a true coelom, often divided by internal septa. 
4)Body possesses a through gut with mouth and anus. 
5)Has a nervous system with an anterior nerve ring, ganglia and a ventral nerve chord. 
6)Has a true closed circulatory system. 
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 Annelid animals are also bilaterally symmetrical and triploblastic, but in addition they have a true body cavity. This allows true organs to be packed in the body structure. These animals are found in a variety of habitats. 
Some common examples are: leeches, and earthworm. 

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