Question

What is double circulation? Describe briefly.

Answer 1

Double Circulation:

• The blood circulation that involves the passing of the blood through the heart two times to complete a cycle is known as double circulation.
• It allows the separation of the blood that does not have the oxygen molecule from the blood having the oxygen molecule.
• This circulation occurs between the heart, lungs, and blood vessels.
• Double circulation includes:

1. Pulmonary Circulation: Pulmonary circulation involves transferring blood that does not have oxygen molecules from the heart to the lungs. The lungs transfer the oxygen molecule to the blood while taking the carbon dioxide from the blood. It causes the oxygenation of the blood. The blood having oxygen then moves to the heart from the lungs.
2. Systemic Circulation: Systemic circulation involves the transfer of the blood that contains oxygen molecules from the heart to the tissues in different body locations. The tissue will take the oxygen molecule from the blood and transfer the carbon dioxide to the blood. It results in deoxygenation of the blood. The blood lacking oxygen then moves to the heart from the tissues.