Figure 5. Gross and histological findings of the model group at different time points after intervention (cross-section). Gross, gross examination; H&E, hematoxylin and eosin staining; Masson, Masson’s trichrome staining (collagen fibers were stained blue, and the background was stained red). Lum, tracheal lumen; Car, cartilage; Gra, granulation tissue; red arrow, perichondrium; asterisk, epithelium.
