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ACOELOMATES

ACOELOMATES. PHYLUM PLATYHELMINTHES & PHYLUM NEMERTINA. PHYLUM PLATYHELMINTHES. Phylum Platyhelminthes-Class Turbellaria: note pharynx, mouth, intestine [fig 3.2-A]. Phylum Platyhelminthes- Class Turbellaria: cross section through middle of organism [fig 3.4].

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ACOELOMATES

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  1. ACOELOMATES PHYLUM PLATYHELMINTHES&PHYLUMNEMERTINA

  2. PHYLUM PLATYHELMINTHES

  3. Phylum Platyhelminthes-Class Turbellaria: note pharynx, mouth, intestine [fig 3.2-A]

  4. Phylum Platyhelminthes- Class Turbellaria: cross section through middle of organism [fig 3.4]

  5. Phylum Platyhelminthes- Class Turbellaria: cross section through pharyngeal region- note pharynx, gastric caeca(intestine), mesenchyme [fig 3.4]

  6. Phylum Platyhelminthes- Class Trematoda View of whole fluke organism.

  7. Phylum Platyhelminthes, Class Trematoda (anterior): note oral sucker, pharynx, caeca & ventral sucker (for attachment) [fig 3.5]

  8. Phylum Platyhelminthes- Class Trematoda: note eggs, ovaries, shell gland, caeca, uterus and testes) [fig 3.5]

  9. Phylum Platyhelminthes- Class Cestoda Scolex and maturing proglottids. The most reproductively mature segments are at the posterior end of the tapeworm.

  10. Phylum Platyhelminthes- Class Cestoda: Scolex region-note rostellum & suckers for attachment [fig 3.7-A]

  11. Phylum Platyhelminthes- Class Cestoda: mature proglottid w/ reproductive structures [fig 3.7-D]

  12. Phylum Platyhelminthes- Class Cestoda: gravid proglottid chock full o’ eggs [close-up of fig 3.7-E]

  13. PHYLUMNEMERTINA

  14. Phylum Nemertina: cross section through anterior, note proboscis sitting in the rhynchocoel & the flattened intestine. [fig 4.3-B]

  15. Phylum Nemertina Note proboscis which sits in the rhynchocoel. This is our 1st organism with a COMPLETE digestive tract (i.e. it has an anus)

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