Biology 112 - PHYLUM PLATYHELMINTHES (Flatworms)

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For Lab Practical

Last updated 2:27 AM on 4/28/26
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4 Terms

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Big Picture

  • Acoelomate, bilateral symmetry

  • Flattened body aids gas exchange

  • One digestive opening (except tapeworms)

  • Flame cells for osmoregulation

  • Many are parasitic

2
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Planaria Whole Mount

  • Label gastrovascular cavity, mouth, eyespots, pharynx

  • Free‑living flatworm

<ul><li><p>Label <strong>gastrovascular cavity, mouth, eyespots, pharynx</strong></p></li><li><p>Free‑living flatworm</p></li></ul><p></p>
3
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Planaria Cross Section

Observe pharynx chamber and branched intestine

<p>Observe pharynx chamber and branched intestine</p>
4
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Tapeworm Whole Mount

  • Label scolex (hooks/suckers), proglottids, reproductive organs

  • Parasitic; absorbs nutrients through body surface

<ul><li><p>Label<strong> scolex</strong> (hooks/suckers), <strong>proglottids, reproductive organs</strong></p></li><li><p>Parasitic; absorbs nutrients through body surface</p></li></ul><p></p>