Circular + Respiratory systems

Circular + Respiratory systems
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  • We start off on a peaceful day. Sarah is sleeping in class. However, lets ask the real questions. How is Sarah getting oxygen to her body?
  • Oxygen passes into our body through our mouth and nose. It then flows down the trachea and into the lungs.
  • Step 1
  • Next, the oxygen gets dropped off at the alveoli and exchanges it for CO2. The lungs then proceed to push the CO2 out. 
  • Step 2
  • Small capillaries partake in the gas exchange and carry oxygen towards the heart and give back the CO2. Red blood cells carry the oxygen while the CO2 is carried in the plasma.
  • Step 3
  • The heart takes the oxygenated blood back through the pulmonary veins and proceeds to pump it out to the body. The deoxygenated blood comes back through the Inferior and Superior Vena Cava.
  • Step 4
  • By: Sasha Kharlamov
  • The End
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