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Question
Identify the animal which is triploblastic and acoelomate.
Identify the animal which is triploblastic and acoelomate.
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Solution
The correct option is D Planaria
Planaria belongs to phylum Platyhelminthes. Body is triploblastic. In triploblastic animals, cells are arranged in three embryonic layers- ectoderm, endoderm and a middle layer – mesoderm. Animals belonging to phylum Platyhelminthes to Chordata have a triploblastic organisation. These organisms are acoelomate. Coelom is absent. The blastocoel is completely occupied by mesoderm. There is only spongocoel or coelenteron present.
Planaria belongs to phylum Platyhelminthes. Body is triploblastic. In triploblastic animals, cells are arranged in three embryonic layers- ectoderm, endoderm and a middle layer – mesoderm. Animals belonging to phylum Platyhelminthes to Chordata have a triploblastic organisation. These organisms are acoelomate. Coelom is absent. The blastocoel is completely occupied by mesoderm. There is only spongocoel or coelenteron present.
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