Platyhelmenthis
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Amar Kumar 8 years, 3 months ago
Platyhelminthes: Triploblastic, acoelomate, unsegmented and bilaterally symmetrical metazoans, without ****, circulatory system, but with a mouth, protonephridial system, parenchyma tissues within the space between the body wall and the gut, and spiral cleavage development.
Characteristic Features of Phylum Platyhelminthes:
1. Phylum Platyhelminthes are triploblastic, acoelomate (without a body cavity) and bilaterally symmetrical animals.
2. Body is soft, un-segmented and dorsoventrally flattened.
3. Metameric segmentation and skeletal structures, in any form, are absent. Pseudometamerism is seen in some members (e.g., Eucestoda).
4. Anterior end of the body is differentiated into a head.
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