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Phylum Platyhelminthes

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Number of Tissue Layers. 3. Endoderm. Ectoderm. Mesoderm. Support/Skeleton. None. Muscular. True muscle tissue. From mesoderm tissue ... – PowerPoint PPT presentation

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Title: Phylum Platyhelminthes


1
Phylum Platyhelminthes
  • Biology I Honors

2
Examples
  • Flatworms
  • Planarian
  • Marine flatworms
  • tapeworms

3
Habitat
  • Freshwater
  • Saltwater
  • Terrestrial

4
Symmetry
  • Bilateral

5
Number of Tissue Layers
  • 3
  • Endoderm
  • Ectoderm
  • Mesoderm

6
Support/Skeleton
  • None

7
Muscular
  • True muscle tissue
  • From mesoderm tissue

8
Digestion
  • Incomplete

9
Respiration
  • Diffusion

10
Excretion
  • Flame Cells and pores

11
Circulation
  • Diffusion

12
Nervous
  • Two nerve cords and ganglia
  • Eye spots
  • chemoreceptors

13
Temperature Regulation
  • Ectothermic

14
Reproduction
  • Sexual
  • Asexual
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