Question

classify the animals on the basis of body cavity and coelom. Give examples. ( 3 marks) ​

Answer 1

Answer:

Coelom is a cavity between the body wall and gut wall, lined by mesoderm. Depending on the presence/absence of coelom, animals have been classified into three: ... Animals belonging to phyla Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata and Chordata are examples of coelomates.

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Answer 2

Hey! I have already answered the similar question. (I will answer again)

https://brainly.in/question/20187053

• Coelom is actually the body cavity between the body wall and gut wall, lined by mesoderm.

• Animals which do not possess coelom are aceolomates. (Platyhelminthes)

• In Aschelminthes, the body cavity (coelom) is not lined by mesoderm but present as scattered pouches. They are Pseudocoelomates.

• Animals which possess coelom are Coelomates. (Annelids to Chordates)

*Coelomates are of two types.

• Schizocoelomates : Schizocoel is formed by splitting of mesodermal mass. (Annelids, Arthropods, Molluscs)

• Enterocoelomates : Enterocoelom is formed by fusion of gut pouches during embryonic stage. (Echinodermata, Hemichordata, Chordata Phyla)

• Also, coelomates can be grouped into protostomes and deuterostomes (based on the fate of blastopore)

• In protostomes,blastopore develops into mouth.

                 Arthropods,annelids and molluscs

• In deuterostomes,blastopore develops into anal opening.

                   Echinoderms,Hemichordates,Chordates

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