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12 The blood circulatory system - answers 1 (a) White cells have nuclei, red cells do not have nuclei. Some white cells can change theirshape, red cells cannot.
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Document Date: 2008-11-13 06:59:48
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12 The blood circulatory system - answers 1 (a) White cells have nuclei, red cells do not have nuclei. Some white cells can change theirshape, red cells cannot.