Bronchus of a lung. Bronchi are supported with plates or rings of cartilage. The bronchi give rise to bronchioles, which are not associated with cartilaginous plates. Bronchioles have a layer of smooth underlying the epithelial mucosa. Image from AF Wiechmann and CR Wirsig (2003) "Color Atlas of Xenopus laevis Histology", (page 52, Chapter 5, Respiratory system: Figure 12). 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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