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Give important characters of Phylum Aschelminthes

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Phylum Aschelminthes: 

(i) Commonly known as round worms or nematodes and covered by cuticle.

(ii) Body is bilaterally symmetrical. 

(iii) They are animals with elongated cylindrical and spindle-shaped body with pointed ends. 

(iv) The body cavity is a false coelom called pseudocoelom. 

(v) The alimentary canal lacks a muscle layer. 

(vi) Respiratory organs and blood vascular systems are absent. 

Example : Ascaris (Round worm), Oxyuris (Pin worm), Ancylostoma (Hook worm), Enterobius, and Rhabditis etc.

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