Biology 5090 · O Level · Blood vessels

Blood vessels — practice question

In what ways do veins differ from arteries?

  • Anarrower lumen; thicker walls; more elastic fibres; fewer muscles
  • Bnarrower lumen; thinner walls; fewer elastic fibres; more muscles
  • Cwider lumen; thicker walls; more elastic fibres; more muscles
  • Dwider lumen; thinner walls; fewer elastic fibres; fewer muscles

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