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)
![CT Bronchial Tree Model with Larynx - 3B Smart Anatomy, 1000274 [G23], Lung Models](/thumblibrary/G23/G23_01_140_140_CT-Bronchial-Tree-Model-with-Larynx-3B-Smart-Anatomy.jpg)
![Human Lung Model with Larynx, 7 part - 3B Smart Anatomy, 1000270 [G15], Lung Models](/thumblibrary/G15/G15_01_140_140_Human-Lung-Model-with-Larynx-7-part-3B-Smart-Anatomy.jpg)
![Segmented Lung Model - 3B Smart Anatomy, 1008494 [G70], Lung Models](/thumblibrary/G70/G70_01_140_140_Segmented-Lung-Model-3B-Smart-Anatomy.jpg)
![Lung Model with Larynx, 5 part - 3B Smart Anatomy, 1001243 [VC243], Lung Models](/thumblibrary/VC243/VC243_01_140_140_Lung-Model-with-Larynx-5-part-3B-Smart-Anatomy.jpg)
![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)
![Lung Set with Pathologies, 1018749 [W33371], Lung Models](/thumblibrary/W33371/W33371_01_140_140_Lung-Set-with-Pathologies.jpg)
![Intestinal Diseases Model - 3B Smart Anatomy, 1008496 [K55], Digestive System Models](/thumblibrary/K55/K55_01_140_140_Intestinal-Diseases-Model-3B-Smart-Anatomy.jpg)
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![Model of Pulmonary Lobule with Surrounding Blood Vessels, 130 times Magnified - 3B Smart Anatomy, 1008493 [G60], Lung Models](/thumblibrary/G60/G60_01_140_140_Model-of-Pulmonary-Lobule-with-Surrounding-Blood-Vessels-130-times-Magnified-3B-Smart-Anatomy.jpg)
![Arteriosclerosis Model, with Cross Section of Artery, 2 part - 3B Smart Anatomy, 1000278 [G40], Human Heart Models](/thumblibrary/G40/G40_01_140_140_Arteriosclerosis-Model-with-Cross-Section-of-Artery-2-part-3B-Smart-Anatomy.jpg)
![Kidney Model with Adrenal Gland, 2 part - 3B Smart Anatomy, 1014211 [K12], Urology Models](/thumblibrary/K12/K12_01_140_140_Kidney-Model-with-Adrenal-Gland-2-part-3B-Smart-Anatomy.jpg)
![Type II Diabetes Set, 1019573 [W33386], Diabetic Teaching Tools](/thumblibrary/W33386/W33386_01_140_140_Type-II-Diabetes-Set.jpg)
![Foot & Ankle Skeleton, Elastic Mounted - 3B Smart Anatomy, 1019358 [A31/1], Leg and Foot Skeleton Models](/thumblibrary/A31-1/A31-1_01_140_140_Foot-Ankle-Skeleton-Elastic-Mounted-3B-Smart-Anatomy.jpg)
![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)
![3B MICROanatomy Artery & Vein Model, 14 times Enlarged - 3B Smart Anatomy, 1000279 [G42], Human Heart Models](/thumblibrary/G42/G42_01_140_140_3B-MICROanatomy-Artery-Vein-Model-14-times-Enlarged-3B-Smart-Anatomy.jpg)
![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)
![Life-Size Human Esophagus Diseases Model - 3B Smart Anatomy, 1000305 [K18], Digestive System Models](/thumblibrary/K18/K18_01_140_140_Life-Size-Human-Esophagus-Diseases-Model-3B-Smart-Anatomy.jpg)
![Skin Burn-Normal Skin Model, 1019569 [W33372], Skin Models](/thumblibrary/W33372/W33372_01_140_140_Skin-Burn-Normal-Skin-Model.jpg)