The New Encyclopædia Britannica: The new Encyclopædia BritannicaEncyclopædia Britannica, 1992 |
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Page 378
... contains the unicellular animals ; and Metazoa , which contains all the multicellular animals . The Metazoa may be further divided into the Parazoa , which contains the Porifera ( sponges ) , which lack defined tissues and have no ...
... contains the unicellular animals ; and Metazoa , which contains all the multicellular animals . The Metazoa may be further divided into the Parazoa , which contains the Porifera ( sponges ) , which lack defined tissues and have no ...
Page 382
... containing blood ( strictly coelomic fluid ) have taken over the func- tion of internal transport , with movement induced by contraction of longitudinal lateral channels . The blood of many annelids contains a respiratory pig- ment ...
... containing blood ( strictly coelomic fluid ) have taken over the func- tion of internal transport , with movement induced by contraction of longitudinal lateral channels . The blood of many annelids contains a respiratory pig- ment ...
Page 384
... contains a number of different types of amoebocytes , some of which are phagocytic and ac- tively migrate between the blood and the tissues . The blood of some sea squirts also contains green cells , which have a unique vanadium - ...
... contains a number of different types of amoebocytes , some of which are phagocytic and ac- tively migrate between the blood and the tissues . The blood of some sea squirts also contains green cells , which have a unique vanadium - ...
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