The 4 piece Bronchus model is a four stage cross-section of the bronchus demonstrating the tissue changes occurring in asthma and chronic bronchitis. Four stages: normal bronchus, hypersecretion of the mucous gland, swelling with lymphoid aggregations and smooth-muscle spasm. The model includes: cartilage, mucous glands and plug, spiraling smooth muscles, and the fibroelastic connective tissue and epithelial layers of the bronchus. All stages rotate on hinge pin.
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models](/imagelibrary/W33362/W33362_01_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models](/imagelibrary/W33362/W33362_02_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models](/imagelibrary/W33362/W33362_03_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models](/imagelibrary/W33362/W33362_04_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models](/thumblibrary/W33362/W33362_01_1200_1200_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models (Small)](/thumblibrary/W33362/W33362_02_1200_1200_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models (Small)](/thumblibrary/W33362/W33362_03_1200_1200_4-Piece-Bronchus-Model.jpg)
![4-Piece Bronchus Model, 1019547 [W33362], Lung Models (Small)](/thumblibrary/W33362/W33362_04_1200_1200_4-Piece-Bronchus-Model.jpg)
![CT Bronchial Tree Model with Larynx & Transparent Lungs - 3B Smart Anatomy, 1000275 [G23/1], Lung Models](/thumblibrary/G23-1/G23-1_01_140_140_CT-Bronchial-Tree-Model-with-Larynx-Transparent-Lungs-3B-Smart-Anatomy.jpg)
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![COPD Bronchial Tissue Model - 3B Smart Anatomy, 1012788 [G50/1], Lung Models](/thumblibrary/G50-1/G50-1_01_140_140_COPD-Bronchial-Tissue-Model-3B-Smart-Anatomy.jpg)
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![Type II Diabetes Set, 1019573 [W33386], Diabetic Teaching Tools](/thumblibrary/W33386/W33386_01_140_140_Type-II-Diabetes-Set.jpg)
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![Deluxe Human Osteoporosis Model (3 Vertebrae with Discs ), Removable on Stand - 3B Smart Anatomy, 1000153 [A78], Vertebra Models](/thumblibrary/A78/A78_01_140_140_Deluxe-Human-Osteoporosis-Model-3-Vertebrae-with-Discs-Removable-on-Stand-3B-Smart-Anatomy.jpg)
![Human Spinal Cord Model, 5 times Life-Size - 3B Smart Anatomy, 1000238 [C41], Human Spine Models](/thumblibrary/C41/C41_01_140_140_Human-Spinal-Cord-Model-5-times-Life-Size-3B-Smart-Anatomy.jpg)
![Human Nose Model with Paranasal Sinuses, 5 part - 3B Smart Anatomy, 1000254 [E20], Ear Models](/thumblibrary/E20/E20_01_140_140_Human-Nose-Model-with-Paranasal-Sinuses-5-part-3B-Smart-Anatomy.jpg)
![Human Larynx Model, 2 part - 3B Smart Anatomy, 1000273 [G22], Ear Models](/thumblibrary/G22/G22_01_140_140_Human-Larynx-Model-2-part-3B-Smart-Anatomy.jpg)
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![Human Kidneys Model with Rear Organs of Upper Abdomen, 3 part - 3B Smart Anatomy, 1000310 [K22/3], Digestive System Models](/thumblibrary/K22-3/K22-3_01_140_140_Human-Kidneys-Model-with-Rear-Organs-of-Upper-Abdomen-3-part-3B-Smart-Anatomy.jpg)
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![Functional Human Larynx Model, 3 times Full-Size - 3B Smart Anatomy, 1001242 [VC219], Ear Models](/thumblibrary/VC219/VC219_01_140_140_Functional-Human-Larynx-Model-3-times-Full-Size-3B-Smart-Anatomy.jpg)