Biology 0610 · IGCSE · Blood

Blood — practice question

The diagrams show blood flow in the circulatory systems of fish and humans. In fish circulation and in human circulation, at which point is the oxygen concentration the greatest?

  • Afish circulation 1; human circulation 4
  • Bfish circulation 1; human circulation 5
  • Cfish circulation 2; human circulation 4
  • Dfish circulation 3; human circulation 6

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