What is Bronchus?
[[File:Gray961.png|thumb]] '''Bronchi''' (one '''Bronchus''') are the large air tubes leading from the [[trachea]] to the [[lung]]s. They carry air to the lungs. The trachea (windpipe) divides to form the right and left main bronchi. These divide to form smaller and smaller tubes called [[Bronchiole|bronchioles]]. Eventually the bronchioles end in the [[Alveolus|alveoli]] (small air sacs). At the alveoli, [[oxygen]] from the air we breathe into our lungs is moved into the [[blood]]. The blood then carries oxygen around to the rest of the body, which needs oxygen to survive. Without the bronchi, air would never get into the lungs, and oxygen would never get into our bodies. The bronchi's walls are made of [[cartilage]]. The right bronchus (shown on the left in the image on this page) is shorter, wider, and straighter than the left bronchus. == Related pages == * [[Bronchitis]] (an illness that affects the bronchi) * [[Asthma]] (a [[disease]] that makes the bronchi get narrower) * [[Bronchodilator]] ([[medicine]] that helps the bronchi get wider when they narrow because of a disease like asthma) {{biology-stub}} [[Category:Pulmonology]] [[Category:Anatomy of the respiratory system]]