00:01
Which of these is not caused by the smoking of tobacco? asthma, chronic bronchitis, cystic fibrosis, or emphysema.
00:14
So tobacco is very damaging to the lungs.
00:17
It causes a lot of potential issues, including lung cancer.
00:22
But which of these does it not cause out of these? so what's emphysema? emphysema is where the alveoli are damaged.
00:32
Because of a destruction of connective tissue in the small airways.
00:36
So there's a lot of collapse of the airways.
00:40
And this is associated with smoking.
00:43
Most cases of emphysema are from smoking.
00:46
So we can roll that one out because it is caused by tobacco.
00:51
Meanwhile, asthma.
00:52
Asthma is caused by extra mucus, partial closure of bronchitis, bronchial swelling...