Some members of this phyl
Some members of this phylum breathe using their plated book lungs while other organs are housed in the hemocoel. This phylum is characterized by, and named for, their jointed legs, and organisms in this phylum have a (*) segmented body protected by an exoskeleton. The classes Trilobita and Arachnida fall under, for 10 points, what phylum that includes invertebrates like crustaceans, spiders and insects?
Some members of this phylum breathe using their plated book lungs while other organs are housed in the hemocoel.