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G8生物上学期期中考试复习提纲 (15章 (血液循环的组成 (blood vessel (vein (血液流速慢), cappilary…

- - - - plasma
      - blood cell
        
        PLT
        
        WBC
        
        RBC
    - - vein
        
        血液流速慢
      - cappilary
        
        物质交换，细胞单个通过
      - artery
        
        血液流速快