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Acoelomates
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| Gnathostomulida @ Nemertea @ Platyhelminthes @ Rhombozoa @ |
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An introduction to the Platyhelminthes and Nemertea, with links to several images.
site exerpt
Acoelomates Characteristics bilateral symmetry cephalization triploblastic acoelomates Characteristics no body cavity [fig. 16.11a body solid, double-walled sac surrounding digestive cavity; tissue-organ grade: organs are aggregates of specialized tissues Taxa Phylum Platyhelminthes flatworms Phylum Nemertea ribbon (or proboscis) worms Phylum Gastrotricha jaw...