*The structure of the larger bronchi is identical to that of the trachea. On the smaller bronchi the cartilage rings are gradually replaced by ''plaques''. Bronchioles have no cartilage at all. | *The structure of the larger bronchi is identical to that of the trachea. On the smaller bronchi the cartilage rings are gradually replaced by ''plaques''. Bronchioles have no cartilage at all. |