TY - CHAP M1 - Book, Section TI - Thoracic and Pulmonary Anatomy A1 - Ellison, E. Christopher A1 - Zollinger, Jr., Robert M. A1 - Pawlik, Timothy M. A1 - Vaccaro, Patrick S. A1 - Bitans, Marita A1 - Baker, Anthony S. Y1 - 2022 N1 - T2 - Zollinger’s Atlas of Surgical Operations, 11e AB - The gross anatomic features of both the lungs are shown in FIGURE 1. On the right side, the major division between the right lower (inferior) lobe (3) and the two others is a major fissure (2) that parallels the course of the fourth rib. The height to which the superior segment extends posteriorly behind the right upper (superior) lobe (1) should be noted because the presence of the right lower lobe at this high level is important in interpreting x-rays. Of similar importance is the position of the right middle lobe (4), whose upper margin is demarcated by the approximately horizontal fissure (5). Accordingly, the middle lobe is entirely in the anterior half of the chest. In the left lung, the superior segment of the left lower (inferior) lobe (9) extends to a similarly high posterior level beneath the left oblique fissure (7) separating the left upper (superior) (6) and lower (inferior) lobes (9). The lingula (8) is, however, incorporated into the upper lobe and occupies a relatively narrow, wedge-shaped area along the anteroinferior border of that lobe. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accesssurgery.mhmedical.com/content.aspx?aid=1187820451 ER -