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By Christopher Pillay and Billy Gowans

Platyhelminthes. (Flatworm). By Christopher Pillay and Billy Gowans. Germ Layers. Groups of cells Triploblastic – t hree germ layers. Symmetry. Bilaterally symmetric – symmetric across one plane. Coelom. Fluid-filled cavity Platyhelminthes does not contain one. Digestive Tract.

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By Christopher Pillay and Billy Gowans

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  1. Platyhelminthes (Flatworm) By Christopher Pillay and Billy Gowans

  2. Germ Layers • Groups of cells • Triploblastic – three germ layers

  3. Symmetry • Bilaterally symmetric – symmetric across one plane

  4. Coelom • Fluid-filled cavity • Platyhelminthes does not contain one

  5. Digestive Tract • Single opening for consumption and elimination of waste

  6. Cephalization • Cephalization – when nervous system becomes concentrated at one end of organism(has brain) • Has cephalization

  7. Segmentation NO

  8. NO Skeleton And no appendages either

  9. Circulatory and Respiratory Systems • None; Processes substituted by absorption through the body wall

  10. Reproduction • Asexual – It can split itself into two new flatworms • Hermaphroditic – Contains both female and male sexual organs

  11. Habitat • Patristic Organisms; exist both inside and outside the host • Likes moist environments

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