Biology 9700 · AS & A Level · The circulatory system

The circulatory system — practice question

Several different tissues are present in the walls of major blood vessels. Which row correctly names the main tissues found in the three layers of an artery wall?

  • Aouter layer: collagen; middle layer: elastic; inner layer: endothelium
  • Bouter layer: collagen; middle layer: muscle; inner layer: elastic
  • Couter layer: elastic; middle layer: collagen; inner layer: endothelium
  • Douter layer: elastic; middle layer: collagen; inner layer: muscle

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