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May 12, 1900


JAMA. 1900;XXXIV(19):1199-1200. doi:10.1001/jama.1900.02460190049010

Councilman1 points out that the lobule of the lung constitutes a definite unit in its anatomy, normal and pathologic. The outlines of the lobules are seen most perfectly on the pleural aspect of the lung; they are triangular, the base corresponding to the pleural surface, and are separated from one another by small strands of connective-tissue which forms either a complete investment of the lobule or is in places wanting. At the apex the bronchus and the artery enter. The small areas supplied by the terminal branches of the bronchus are commonly called "acini," though Miller has designated them lobules, but the use of the term lobule in this sense can be at once seen to be confusing. The bronchial passage ends in an atrium, thoroughly described by Miller, from which the air-sacs or infundibula are given off, and from these arise the air-cells or alveoli. Councilman emphasizes the