What is a double system?

• Double system:

  • RV pumps deoxygenated blood away
  • To lungs
  • Oxygenated blood blood flows to LA
  • LV pumps oxygenated blood to rest of the body
  • Deoxygenated blood returns to RA
• Double system ✔️:

  Fast

  Pumps blood further around the body

  Hbp
• Double system ❌:

  Hbp can lead to heart disease