Question: what is the difference between bronchi and bronchioles?
Answer: The bronchi (or bronchus) are the air passages into the lungs that begin at the end of the trachea. ... The bronchioles or bronchioli are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lungs, in which branches no longer contain cartilage or glands in their sub-mucosa.