The function of the septum is to

  1. stop backflow into the atria
  2. pump blood to the lungs
  3. supply the heart with oxygen
  4. prevent oxygenated and deoxygenated blood mixing
Answer

D) prevent oxygenated and deoxygenated blood mixing

The septum separates the two sides. O Level Biology · Topic 11 Transport in Humans · 11.2 Heart

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