Biology 9700 · AS & A Level · The circulatory system

The circulatory system — practice question

Which row gives the correct answer for the pulmonary vein?

  • Ablood carried: deoxygenated; muscle in walls: thick; lumen size: small
  • Bblood carried: deoxygenated; muscle in walls: thin; lumen size: large
  • Cblood carried: oxygenated; muscle in walls: thick; lumen size: small
  • Dblood carried: oxygenated; muscle in walls: thin; lumen size: large

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