Pulmonary circulation

Definition

Pulmonary circulation is the part of the circulatory system that carries deoxygenated blood from the right ventricle of the heart to the lungs and returns oxygenated blood to the left atrium. It is essential for gas exchange, where carbon dioxide is expelled, and oxygen is absorbed.

5 Must Know Facts For Your Next Test

1. Pulmonary circulation begins in the right ventricle and ends in the left atrium.
2. The pulmonary artery carries deoxygenated blood to the lungs.
3. Gas exchange occurs in the alveoli within the lungs during pulmonary circulation.
4. The pulmonary veins return oxygenated blood to the heart.
5. Pulmonary circulation operates at a lower pressure compared to systemic circulation.

Review Questions

• What is the main function of pulmonary circulation?
• Which vessels carry deoxygenated blood to the lungs?
• Where does gas exchange occur in pulmonary circulation?

Related terms

Systemic Circulation: The part of the circulatory system that carries oxygenated blood from the left ventricle throughout the body and returns deoxygenated blood to the right atrium.

Alveoli: Small air sacs in the lungs where gas exchange takes place.

Right Ventricle: The chamber of the heart that pumps deoxygenated blood into pulmonary circulation.