If we consider the structure of the bronchial tree, we shall perceive that natural breathing tends to prevent the accumulation of matters in its tubes, in spite of gravitation. [1840, The Pathology and Diagnosis of Diseases of the Chest, page 55:]
Other methods of obtaining stasis which have been suggested, such as the introduction of adrenaline into the bronchial treen have not impressed us with their efficacy. [1934 October 27, “Haemoptysis”, in The British Medical Journal, page 764:]
We explored a newly established repository providing high-resolution bronchial trees from the four most commonly studied laboratory mice (B6C3F1, BALB/c, C57BL/6[,] and CD-1). [2020 February 1, “The fractal geometry of bronchial trees differs by strain in mice”, in Journal of Applied Physiology, volume 128, number 2, American Physiological Society, →DOI, pages 362–367:]