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SlideshowReport

Respiration in chelicerates

Description
Above, a spider’s book lung. The lung contains many thin sheets of tissue, somewhat like the pages of a book. As hemolymph moves through spaces between the “pages,” it exchanges gases with air in adjacent spaces.Left, horseshoe crab hemolymph. Like spider hemolymph, it contains hemocyanin, a respiratory pigment that is blue-green when carrying oxygen.
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