The majority of bronchial arterial openings originate from the thoracic aorta (anterior wall) or the aortic arch, with very few originating from the right anterior, right, or left anterior wall of the thoracic aorta, or the inferior wall of the aortic arch.
The bronchial arteries are small, mostly in the anterior wall of the thoracic aorta in the plane of the 4-6 thoracic vertebrae. The bronchial arteries are usually 2-4 in number, with 1 bronchial artery on the right side and 2 bronchial arteries on the left side. The right bronchial artery is easier to insert because the opening is mostly in the right wall of the aorta, whereas the left bronchial artery is more difficult to intubate.
The bronchial arteries are very important blood vessels supplying nutrients to the lung tissues, nourishing the walls of the bronchioles in the lungs, the walls of the pulmonary blood vessels, and the visceral pleura.