What is the difference between organisms on the basis of the coelom ? Give
examples for each
Answers
Coelom is a key feature for classification. Coelom is a cavity between the body wall and gut wall, lined by mesoderm. Depending on presence/absence of coelom, animals have been classified into three:Coelomate: Coelom is present in a coelomate. Animals belonging to phyla Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata and Chordata are examples of coelomates.Pseudocoelomate: In pseudocoelomates, mesoderm appears as pouches between endoderm and ectoderm. But the cavity formed is not lined by mesoderm
e.g. Aschelminthes.Acoelomate: Coelom is absent in an acoelomate,e.g. Platyhelminthes.
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Explanation:
Coelom is a key feature for classification. Coelom is a cavity between the body wall and gut wall, lined by mesoderm. Depending on presence/absence of coelom, animals have been classified into three:
Coelomate: Coelom is present in a coelomate. Animals belonging to phyla Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata and Chordata are examples of coelomates.
Pseudocoelomate: In pseudocoelomates, mesoderm appears as pouches between endoderm and ectoderm. But the cavity formed is not lined by mesoderm, e.g. Aschelminthes.
Acoelomate: Coelom is absent in an acoelomate,e.g. Platyhelminthes.