Blood Supply, Lymphatic Drainage, and Nerve Supply of the Lungs

Arterial Supply of the Lungs

The lungs receive their arterial blood supply primarily from the pulmonary arteries and the bronchial arteries. The pulmonary arteries deliver deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation, while the bronchial arteries provide oxygenated blood to the lung tissue itself.

Pulmonary Arteries

• Originate from the pulmonary trunk.
• Branch into the right and left pulmonary arteries.
• Further divide into smaller arterioles within the lung tissue.
• Facilitate gas exchange within the alveoli.

Bronchial Arteries

• Branch from the thoracic aorta.
• Supply oxygenated blood to the bronchi, visceral pleura, and lung parenchyma.
• Form anastomoses with the pulmonary arteries.
• Help maintain tissue viability and function.

Clinical Significance

Understanding the arterial supply of the lungs is crucial in diagnosing and managing conditions such as pulmonary embolism, bronchial artery aneurysms, and lung infarctions. Any disruption in blood flow can lead to severe respiratory distress and complications.