Biology 9700 · AS & A Level · The circulatory system

The circulatory system — practice question

Which characteristics allow the aorta to withstand the high pressure during ventricular systole?

  • Acollagen fibres and elastin fibres
  • Bcollagen fibres and endometrium
  • Celastin fibres and large lumen
  • Dsmooth muscle and small lumen

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