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Last reviewed dd mmm yyyy. Last edited dd mmm yyyy
Conducting bronchioles are formed from the early divisions of the subsegmental bronchi within the bronchial tree. Histologically, their epithelium resembles that of the bronchi in that there are:
However, the cartilage has now disappeared from the outer section of their walls and in the same layers, spirally-orientated smooth muscle fibres become more apparent. With progression along the conducting bronchioles, the ciliated pseudostratified epithelium is replaced by a cuboidal ciliated epithelium.
The conducting bronchioles are continous with the terminal bronchioles.