Biology 9700 · AS & A Level · The circulatory system

The circulatory system — practice question

The graph shows information about blood vessels and blood flow. Which row correctly names the curves?

  • Aspeed of blood flow: X; pressure of blood: Y; total cross-sectional area: Z
  • Bspeed of blood flow: X; pressure of blood: Z; total cross-sectional area: Y
  • Cspeed of blood flow: Y; pressure of blood: Z; total cross-sectional area: X
  • Dspeed of blood flow: Z; pressure of blood: X; total cross-sectional area: Y

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