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| Description: Open circulatory system. A grasshopper’s heart pumps hemolymph through a large vessel and out into tissue spaces. Hemolymph mingles with interstitial fluid, exchanges materials, and then reenters the heart through openings in its wall. Closed circulatory system. An earthworm’s hearts pumps blood through vessels that extend through the body. Exchanges between blood and the tissues take place across the wall of the smallest vessels. Picture Stats: Views: 152 Filesize: 388.48kB Height: 690 Width: 1674 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47547 |