Question

Give reason why plathyhelminthes and nematoda posses a pseudocoelum

Answer 1

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THANKS FOR THE QUESTION !

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=> THE BODY CAVITY IS ONE OF THE MAIN CRITERION FOR ANIMAL CLASSIFICATION

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=> THERE ARE THREE TYPES OF BODY CAVITY ....

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=> ANIMALS HAVING BODY CAVITY ARE CALLED AS EUCOELOMATES

=> IN THESE ANIMALS BODY CAVITY IS MADE BY MESODERM OR GUT

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=> ANIMALS DON'T HAVING BODY CAVITY ARE CALLED AS ACEOLOMATES .....

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=>IN OTHER ANIMALS BODY CAVITY IS PRESENT.....

BUT

IT IS MADE FROM ANOTHER MATERIALS THAN MESODERM OR GUT ARE CALLED AS PSEUDOCOELOMATES

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=> UNLIKE OTHER ORGANISMS IN DIFFERENT PHYLA ......

=> THE ORGANISMS IN PLATYHELMINTHES PLYLUM HAVE FLAT AND LEAF LIKE BODY.....


=> SO THEY DON'T POSSESS THE BODY CAVITY ......

SO THEY ARE ACEOLOMATES......

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=> IN THE PHYLUM ASCHELMINTHES THE ORGANISMS HAVE THE BODY CAVITY .....

BUT IT IS NOT MADE FROM MESODERM OR GUTS AND THAT'S WHY......

=> THE ORGANISMS IN THE GROUP ASCHELMINTHES HAVE THE PSEUDOCOELOMATE BODY......

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I THINK NOW IT IS VERY CLEAR FOR U....

FOR MORE UNDERSTANDING PLEASE REFFER THE PICTURE......