No, bronchioles (except in the whale) do not contain cartilage. The bronchioles in whales contain cartilage in order to prevent them from collapsing before other parts of the airways (and trapping gas in the alveoli). This helps prevent the bends - as nitrogen is removed from the alveoli before large pressures cause it to diffuse across the thin walls present there.
alveoli
The bronchiolesor bronchioliare the first airway branches that no longer contain cartilage. They are branches of the bronchi. The bronchioles terminate by entering the circular sacs called alveoli.
Alveoli
Think about this one for a minute. Would it be a good idea for the windpipe to fold up like a garden hose every time you bend your head? What would happen if your air supply was cut off every few seconds? The cartilage keeps the trachea and bronchi open at all times.
I kinda wanna poop all over you right now No, the cartilage rings are on the bronchi. see this website, it might clear some things up. http://ect.downstate.edu/courseware/histomanual/respiratory.html
alveoli
Alveoli alveoli - air sacs in your lungs
Alveoli
The humorus
alveoli take co2 from
the alveoli is happen the blood