distinguish between aschelminthes and Annelida
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The body of these organisms is unsegmented and triploblastic. They have a pseudocoeloem, where the body cavity is not lined by the mesodermal layer. The body is cylindrical or thread like with elongated, slender worm-like appearance and tapering at both ends.
Explanation:
Symmetry and Size. Annelids are all bilaterally symmetrical animals. ...
Coelom. ...
Body wall. ...
Parapodia. ...
Nervous system. ...
Sense organs. ...
Circulation and respiratory structures. ...
Segmental organs.
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