* the body cavity , which is lined by mesoderm is called coelom.
*acoelomates-the animal in which the body cavity is absent is called acoelomates. e.g.- platyhelminthes.
*presence or absence of coelom is very important in classification..
*coelomates- animal posses coelom is called coelomates.e.g- annelida, mollusca, arthropoda, echinodermata, hemichordata and chordates
.
*pseudocoelomates- the body cavity is not lined by mesodern and it is found in scattered form, such body cavity is called pseudocoelom and the animal possessing them is called pseuducoelomates. e.g.-aschelminthes
*coelomates- animal posses coelom is called coelomates.e.g- annelida, mollusca, arthropoda, echinodermata, hemichordata and chordates
.
*pseudocoelomates- the body cavity is not lined by mesodern and it is found in scattered form, such body cavity is called pseudocoelom and the animal possessing them is called pseuducoelomates. e.g.-aschelminthes
*acoelomates-the animal in which the body cavity is absent is called acoelomates. e.g.- platyhelminthes.
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