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10.9: Pulmonary blood supply

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    10153
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    Blood supply

    The lungs receive two distinct sources of blood supply: pulmonary arterial supply and bronchial arterial supply. The pulmonary arterial circulation originates from the right side of the heart. Histologically, pulmonary arteries and veins are often adjacent to bronchi and larger bronchioles. These vessels progressively divide into smaller caliber vessels and, terminally, form a network of capillaries that course through alveolar septa and function in gas exchange. These capillaries then form into venules, then veins that progressively become larger in size and exit the lung, entering the left atrium. Bronchial arteries originate from the thoracic aorta and also course along large airways, providing much of the blood supply to these structures, as well as the pleura.


    This page titled 10.9: Pulmonary blood supply is shared under a CC BY-NC 4.0 license and was authored, remixed, and/or curated by Ryan Jennings and Christopher Premanandan via source content that was edited to the style and standards of the LibreTexts platform.

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