Lungs, Posterior View

Description

Centered within the posterior thorax, the right and left lungs are opened to reveal the intrapulmonary bronchial tree arising from the trachea and main bronchi, then branching into lobar and segmental bronchi that course inferiorly and laterally toward the peripheral parenchyma. Segmental anatomy is implied by the orderly, tree-like distribution of bronchi within each lung, with the right lung typically subdividing into superior, middle, and inferior lobes and the left lung into superior and inferior lobes. Medial to the lungs sits the heart, with the great vessels entering and leaving the mediastinum, while fine terminal airways and clustered alveoli occupy the most distal regions. Green lymphatic vessels and hilar or tracheobronchial lymph nodes track along bronchovascular pathways. Posterior orientation matters because it mirrors what you evaluate on back-focused thoracic imaging and during posterolateral thoracotomy, where the relationship of segmental bronchi to adjacent vessels guides safe dissection. Segmental bronchopulmonary anatomy also anchors bronchoscopy reports and surgical planning for segmentectomy or lobectomy, since obstruction or tumor in a segmental bronchus produces predictable patterns of atelectasis or post-obstructive pneumonia. Lymphatic drainage pathways shown near the hilum help explain nodal staging in lung cancer, including why subcarinal and hilar nodes commonly enlarge with central airway disease. A practical map. Use this asset in gross anatomy and respiratory physiology teaching to connect tracheobronchial branching with gas exchange at the alveoli, and in cardiothoracic surgery or pulmonology materials that discuss bronchial anatomy, lymph node stations, and the cardiopulmonary relationship in the posterior mediastinum. Anatomical accuracy verified by SciePro's Medical Advisory Board.