- Types:
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branchia, gill
respiratory organ of aquatic animals that breathe oxygen dissolved in water
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lung
either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood
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book lung
organ in many arachnids containing many thin folds of membrane resembling the leaves of a book
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ctenidium
comb-like respiratory structure serving as the gill of certain mollusks
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ceras
one of the often brightly colored and branching hornlike structures on the back of the nudibranch (and other related mollusks) that serve as gills
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external gill
occurs in some mollusks and in tadpoles and other immature amphibians
