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  Word: Leptocardia

  ID	Word	Wordtype	Definition
  88405	Leptocardia	n. pl.	The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colorless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus.

  
  

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