(3 7/8″ x 1 1/2″ x 1 3/4″) Four stage cross-section of bronchus demonstrating the tissue changes occurring in asthma and chronic bronchitis.
Four stages include 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.
