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CBSE Class 9 Answered

why is coelom absent in diploblastic organisms?
Asked by aishanikhanna | 03 Mar, 2011, 01:23: AM
Expert Answer
Dear student,
In triploblastic animals, the 3 germ layers are ectoderm, mesoderm and endoderm, the mesoderm being the middle layer. However in diploblastic animals, only the ectoderm and endoderm are present.
The true body cavity or coelom originates from the mesoderm and since this layer is absent in diploblastic animals, they lack coelom.
Regards, Team Topperlearning
Answered by | 04 Mar, 2011, 08:06: AM
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