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  • Platyhelminthes are best described asOption: 1 Flatworms, triploblastic, acoelomateOption: 2 <

Platyhelminthes are best described as

Option: 1

Flatworms, triploblastic, acoelomate


Option: 2

Flatworms, diploblastic, acoelomate


Option: 3

Flatworms, triploblastic, coelomate


Option: 4

Flatworms, triploblastic, pseudocoelomate


Answers (1)

best_answer

 

 

Phylum Platyhelminthes -

  • Platyhelminthes are also called flat-worms because the cross-section of the body is flat.
  • The body is dorsoventrally flattened.
  • This phylum consists of planaria, flukes and tapeworms.
  • These are triploblastic animals, i.e., the embryo shows the arrangement of three germ layers as ectoderm, mesoderm and endoderm.
  • These are acoelomate. The space between ectoderm and endoderm is filled with mesodermal tissue called parenchyma.
  • They show bilateral symmetry. They are the first animals to show a degree of cephalization. 
  • They show an organ level of body organization.
  • They are mostly parasitic. Some free-living forms are aquatic. 
  • They have an unsegmented body. Tapeworms show pseudo segmentation.
     

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Platyhelminthes are triploblastic animals, i.e., the embryo shows the arrangement of three germ layers as ectoderm, mesoderm and endoderm. These are acoelomate. Platyhelminthes are also called flat-worms because the cross-section of the body is flat.

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