Differences between cancerous and normal respiratory system

[shadow]

Ok, I'm doing homework. The info is not in the book (if you can even call it a book), I've spent an hour on the internet looking. I've found tons of differences between cancerous and non-cancerous cells, but not of the entire respiratory system. Please gimme a hand those that know.

thx,

 

[shadow]

bump

 

[bizmark]

dunno if "cancer of the respiratory system" even exists. Lung cancer, larynx cancer, throat cancer, mouth cancer.... these are all cancers that affect parts of the respiratory system.

Cancer is always the same in terms of exactly what it does (growth of cells that shouldn't be there), but various cancers differ in how they get started and what complications they cause. E.g. lung cancer often occurs due to smoking, and it can lead to problems breathing as brachii get clogged up, and it's also easily metastatized since there's soooo many blood vessels in the lungs.