Bronchus of the lung. Bronchi are identified by the presence of hyaline cartilage and smooth muscle below the epithelial layer. Note the orientation of the smooth muscle cells (similar to the orientation of smooth muscle cells that occurs in arteries) in this oblique section. Image from AF Wiechmann and CR Wirsig (2003) "Color Atlas of Xenopus laevis Histology", (page 53, Chapter 5, Respiratory system: Figure 14). Copyright 2003. Kluwer Academic Publishers. Reproduced with kind permission from Springer Science & Business Media B.V.
Image published in: Color Atlas of Xenopus laevis Histology
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