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[Structural organization of a human lung lobule]
G S Shishkin1, V V Goncharov, R I Valitskaia
1Institute of Physiology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk.
Morfologiia (Saint Petersburg, Russia)
|September 16, 1999
Summary
Human lung lobules have an identical structure across all lobes, featuring a repeating bronchial branching pattern. Each lobule contains 8-20 acini, with the right lung averaging 1200 lobules.
Area of Science:
- Human Anatomy
- Pulmonary Medicine
- Microscopic Structure
Background:
- Understanding the structural organization of human lung lobules is crucial for respiratory research.
- Previous studies have provided foundational knowledge, but detailed 3D reconstruction offers new insights.
Purpose of the Study:
- To investigate the detailed structure and quantify the number of human lung lobules.
- To elucidate the branching patterns of the bronchial tree within lobules.
Main Methods:
- Corrosion casting preparations of human lungs.
- Three-dimensional (3D) reconstruction utilizing serial histological sections.
Main Results:
- Identified a consistent lobular structure across all human lung lobes.
- Established that the bronchial tree branches 4-6 times within lobules, forming 3-5 orders of intralobular bronchioles and 1 order of terminal bronchioles.
- Determined that a human lung lobule comprises 8-20 acini, with an average of 1200 lobules in the right lung.
Conclusions:
- The human lung lobule is a fundamental structural unit with a repeating bronchial branching pattern.
- The consistent lobular architecture suggests a conserved functional organization in human lungs.
- Quantification of lobule numbers provides baseline data for further pulmonary research.