Pulmonary Circulation

Pulmonary Circulation is the aspect of the blood that deals with its transportation due to the need for oxygen from the lungs and getting rid of waste including Carbon Dioxide.

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 circulation of blood flow is functionally divided into two different systems:

1.) Pulmonary Circulation

2.) Systemic Circulation

The pump for the pulmonary circulation is the Right Ventricle. The blood flows through the Lungs. The pump for the systemic circulation is the Left Ventricle which provides the blood supply for the tissue cells of the body.

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 the bloodstream 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