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lymph heart

A Dictionary of Biology | 2004 | 352 words | Copyright

lymph heart Any of a series of muscular pumping structures that occur in the major lymphatic vessels of certain lower vertebrates and maintain a flow of lymph around the body. Many animals (including all mammals) do not possess lymph hearts; in these the flow of lymph is maintained by a series of muscle contractions and valves (see lymphatic system).

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