THE ARTERIAE BRONCHIALES AND THEIR ANASTOMOSES WITH THE ARTERIA PULMONALIS IN THE HUMAN LUNG; A MICRO-ANATOMICAL STUDY

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Abstract
In 13 pairs of human lungs with no evidence of pulmonary vessel disease, the author injected the bronchial arteries with 10% gelatine mixed with chalk, fixed the tissues in formalin and prepared serial paraffin sections from blocks 1-2 cm. thick. The bronchial arteries were found to supply the air tubes as far as the respiratory bronchioles, and also parts of the visceral pleura, much of the mediastinal and interlobular pleura, a little of the diaphragmatic and costal. Anatomoses between pulmonary and bronchial arteries occured in the bronchi and the visceral pleura. In the smaller air passages, adventitia of the pulmonary vessels, and visceral pleura, the intimal longitudinal muscle of the bronchial arteries was so abundant that the intima was thicker than the media and the lumen was sometimes closed. In some places the media was also enlarged and its fibers were spirally arranged. Arteriovenous anastomoses were never found.

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