Pulmonary Circulation is the aspect of the blood that deals with the transport of blood needing oxygen from the lungs.

It is a primary aspect of both the Respiratory System and Cardiovascular System.

The blood is brought back from the body into the Heart and shipped to the Lungs.

The result is called oxygenated blood.

Blood without oxygen is called deoxygenated blood.

This blood returns back to the heart and is shipped out to the rest of the body.

There is a separate system, the supplies blood to the lungs – called Bronchial Circulation.

This brings blood to the large airways and tissue of the Lungs.




Step 1)

  • Oxygen depleted blood (filled with Carbon Dioxide) returns to the heart and into the Right Atrium and then into Right Ventricle

Step 2)

  • Oxygen depleted blood leaves heart by the Right and Left Pulmonary Arteries and enters lungs

Step 3)

  • Oxygen depleted blood releases carbon dioxide

Step 4)

  • Oxygen enters blood stream via the lungs into the blood

Step 5)

  • Oxygenated blood returns to the heart via Pulmonary veins

Step 6)

  • Oxygenated blood enters Left Atrium then into Left Ventricle

Step 7)

  • Oxygenated blood is pumped throughout the body


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