CBSE Notes | Class 9th | Science| NCERT Based :Annelida

Submitted by admin on Fri, 12/02/2011 - 11:21

Annelida

Annelida animal are also bilaterally symmetrical and triploblastic, but in addition they have a true body cavity. This allows true organs to be packaged in the body structure. There is, thus, extensive organ differentiation. This differentiation occurs in a segmental fashion, with the segments lined up one after the other from head to tail. These animals are found in a variety of habitats-fresh water marine water as well as land. Earth worms and leeches are familiar example.

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