Wood Asthma Anatomy
To better understand allergic alveolitis, it helps to understand the anatomy of the lungs.
Inside the chest, the windpipe, or trachea, divides into two smaller tubes: the right bronchus and the left bronchus. The right bronchus enters the right lung and the left bronchus enters the left lung. The right bronchus and left bronchus branch into smaller and smaller tubes.
The smallest tubes, called bronchioles, end in tiny air sacs, called alveoli. Blood flows very close to the walls of the alveoli. Oxygen and carbon dioxide pass between the air and the bloodstream through the wall of the alveoli.
- Greenberger PA. Mold-induced hypersensitivity pneumonitis. Allergy Asthma Proc. 2004 Jul-Aug;25(4):219-23. 
- Hypersensitivity pneumonitis. Allergy Asthma Proc. 2004 Jul-Aug;25(4 Suppl 1):S40-1. 
- Miranowski AC, Grammer LC. Occupational immunologic lung disease. Allergy Asthma Proc. 2004 Jul-Aug;25(4 Suppl 1):S36-7. 
- Selman M. Hypersensitivity pneumonitis: a multifaceted deceiving disorder. Clin Chest Med. 2004 Sep;25(3):531-47, vi.