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The top documents tagged [separate gill]
Respiration. Jawless Fishes Gills - pore-like openings 7 pairs of gill pouches in lamprey 5-15 pairs of gill pouches in hagfish, but varying numbers
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Phylum Chordata Dorsal hollow nerve cord Dorsal hollow nerve cord Pharyngeal gill slits Pharyngeal gill slits Notochord Notochord
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