explain how smoking causes lung cancer?

Answer 1

Smoking is not the only thing that causes lung cancer it can be one of the causes but, there are others,chemicals,pollutants auto emissions and others. Any of these get into your lungs and causes damage and or lung cancer.

Answer 2

Smoking causes lung cancer because there are substances within tobacco that are known to cause cancer. These substances are known as carcinogens (which means "cancer-causing agents"), and it is these carcinogens that cause the actual damage to the cells in the lungs. A cell that is damaged may become cancerous over a period of time.
One cannot predict which smoker is at greater risk of developing lung cancer. In general, though, a smoker's chances of developing cancer depends on:

The age that the person began smoking

How long the person has smoked

How many cigarettes per day the person smokes


Passive smoking - breathing in someone else's smoke - may also increase the risk for developing lung cancer.

The main symptoms of lung cancer are coughing up blood and coughing that does not seem to improve and gets worse with time. Other symptoms are chest pain, shortness of breath, recurrent episodes of pneumonia, weight loss, and feeling tired.

Lung cancer is diagnosed with x-rays, an analysis of sputum (material a person coughs up), and biopsy of tissue from the lung.

Answer 3

There are substances in tobacco smoke which with repeated contact, are known to cause cancers. Those substances are labeled as "tars". When these tars are put on human or animal skin, repeatedly, the cells begin to react, first with simple irritation, and then with actual DNA changes. No one quite knows why. The inhaling of tobacco products over a year or two generally is not enough for a cancer to develop, but as the exposure time increases, so does the chance for the cells to make errors. Once a cell has made an error, that error remains in future divisions. This is called cancer. And cancer has the unique ability to transplant, and grow in other organs.

The tars in cigarettes and other tobacco products also cause cancers in the larynx, and in the esophogas -- oral cancers are common in snuff and chewing tobacco users. And the constricting effect of nicotine is detrimental to gum tissues, as well as arteries both in the body and in the heart.... Certainly, cigarette smoke is not the only cause of lung cancers -- aespestos causes mesothelioma, an extrememely rare type of lung cancer, usually found in people who have worked in industries where aespestos was used. (ship building, insulation, and car brake replacement jobs.

Recent research is indicating that even if one smoked for only 10 years, that person, years later -- will have a slightly higher chance of getting lung cancer, even if they quit 40 or 50 years ago.

There are tons of other things that smoking will cause, but you asked only about lung cancer.....


Helpful??

Answer 4

Its really strange - I have cancer and have a limited period to live. I am not scared of death as I know where I am going thanks to an out of body experience I had during one of my many surgeries. Everyone is under the notion that smoking causes cancer - be it lung or oral or anything. You can go through any website and you will see that no doctor has ever had conclusive proof that smoking causes cancer. Yes, I agree its bad for ones system as it does create breathing problems etc. at a later stage in life but again as I said noone has been able to prove that smoking is the cause of the illness. I poured through websites and finally opted for radiation and chemo ( thats another story). The source of my cancer ( though I was smoking 30/40 cigarettes a day as my job stress levels were at their peak) was not the smoking but "voice abuse". I for one had never imagined that there could be anything called cancer due to voice abuse and the doctor asked me right away what my cellular bill was every month and how many cellulars I carried. She was shocked when I showed her a copy of my bill(appox.9500 $ per month per cellular! - no jokes at all) and told me again that there was no doubt that it was due to voice abuse.

Answer 5

i'm not sure but my mom smoked for many years, then she finally quite and had been for 5-6 years. she died of lung cancer around her 6-7 year of being tobacco free. Someone told me people who smoke and stop have a higher rate of getting such cancers for up to 7 years after.

Answer 6

Tobacco smoke contains hundreds of organic compounds, some of which affect DNA replication or the cell apoptosis mechanism. If you succeed in killing the apoptosis system, you've got cancer.

Answer 7

My grandfather died of lung cancer and never smoked in his life.My grandmother did not smoke either so it was not secound hand smoke