My question is please give me an essay on cancer caused by tobacco around 500 words
Answers
There are millions of people around the globe who are used to smoking or taking tobacco in some form. Not many of them are aware that tobacco intake can lead to formation of over 16 different types of cancer conditions in our body. Most of them can lead to death during your life time. With a single puff of cigarette you are actually taking in over 7000 different types of chemicals.
These chemicals when inhaled directly get mixed with the circulatory system. Amongst 7000 chemicals, it is obvious that over 69 chemicals are well known and are a type of carcinogens. Some of the most common types of cancers that are formed on account of smoking tobacco are mentioned here below.
• One of the most common types of cancer that is caused by tobacco is the lung cancer. It is commonly amongst people who are used to smoking tobacco in form or the other. It is also believed that lung cancer is most prevalent and can affect over 13 percent of the global population.
• Another major form of cancer is the Sinuses, nose and mouth cancer. One of the major causes of this cancer is smoking. The cancer is also not curable when treated in last stage.
• Another major form of cancer that is formed on account of tobacco is the Esophagus cancer. This can be caused by chewing or smoking tobacco.
• Tobacco can also lead to more severe form of cancer that is formed in urethra, kidney or gall bladder.
• Apart from this tobacco can also lead to pancreas cancer that is most common type that is formed on account of chewing and smoking tobacco.
• Chewing tobacco can also lead to the formation of cancer in the stomach region. It affects the inner lining of the stomach.
• Liver is another major body organ that can easily be affected by cancer cells on account of chewing or smoking tobacco.
• Blood cancer is also one of the most common types of cancer that is formed by smoking cigarette. Apart from this tobacco can also affect the private organs and its performance in your body. Your bowel movement is affected completely leading to formation of cancer cells.
You need to keep in mind that our body has the tendency to repair itself. So the moment you decide to quit smoking the body starts repairing itself after 6 hours of quitting.
Once the importance of environmental factors in triggering the development of cancer had been established, the question arose as to the identity of the agents involved. At the top of the list is tobacco smoke, now known to be responsible for roughly one of every three cancer deaths.
Tobacco smoke is responsible for approximately one-third of all cancer deaths.The first indication of the dangers posed by tobacco smoke came from the emergence of lung cancer as a major disease. Lung cancer was one of the rarest forms of cancer prior to the twentieth century, with only 140 cases reported in the entire world medical literature up until 1898.
As late as the 1920s, doctors were still being called in to observe any case that did arise because of the belief that they might never have an opportunity to see a patient with lung cancer again! Today lung cancer is among the most frequently encountered cancers, causing more deaths than any other type.
So what happened during the twentieth century to convert a rare cancer into the number one cancer killer? When doctors started asking questions of the increasing number of lung cancer patients that came to their offices in the early 1900s, it was discovered that virtually all individuals with lung cancer shared one thing in common: They smoked cigarettes. Moreover, cigarette smoking was a relatively new habit.
During the 1800s tobacco had been consumed in relatively small amounts, mainly in the form of pipe tobacco, chewing tobacco, and cigars. Habits began to change with the invention of the cigarette rolling machine in 1881, followed by the introduction of safety matches shortly thereafter.
Both developments encouraged the smoking of tobacco, and the number of cigarettes consumed per year went from a few dozen per person in 1900 to an average of more than 4000 per person in 1963, the year that smoking rates peaked in the United States.
It illustrates the relationship between this explosive growth in cigarette smoking and the ensuing epidemic of lung cancer. Examination of this graph reveals that a time lag of about 25 years transpired between the increase in smoking rates and the subsequent increase in lung cancer rates. We now know that such a long delay is typical of the behavior of human cancers, which often require many years after carcinogen exposure to complete the steps involved in creating a malignant tumor.
Relationship between Cigarette Smoking and Lung Cancer in the United States
When the link between cigarette smoking and lung cancer was first widely publicized in the 1960s, some scientists (and virtually all representatives of the tobacco industry) questioned whether epidemiological data pointing to events separated by 25 years could demonstrate that smoking and cancer risk were connected in any way.
After all, it could be easily argued that the epidemic of lung cancer that began in the 1940s was caused by some environmental factor that appeared at the same time, such as air pollution, rather than being triggered by cigarette smoking 25 years earlier.
As we saw earlier in this article, it is inherently difficult to infer cause-and-effect relationships from epidemiological data, and the problem is further magnified when the events being investigated are separated by long periods of time.
Caution in drawing conclusions about the linkage between smoking and lung cancer was appropriate in 1960 because of the limited amount of evidence available at the time. Hundreds of subsequent studies, however, have made it abundantly clear that smoking is the underlying cause of most lung cancers. Some of the additional evidence is seen in the portion of Figure 7 that covers the period after 1960, when two patterns emerged that had not been evident in the earlier data.
The first pattern is that smoking rates peaked during the 1960s and then began to slowly decrease. If the hypothesis that smoking causes lung cancer is correct, lung cancer rates should have started to decline about 25 years later, which is exactly what happened.
The difference in timing between the onset of smoking as a common habit among men and women fostered a myth, often heard in the 1960s, which claimed that cigarettes cause lung cancer in men but not in women
The origin of such a myth is easy to understand. Many men and women were smoking cigarettes on a regular basis by the early 1960s, but lung cancer was seen mainly in men because they had started smoking decades earlier and it takes about 25 years for lung cancer to develop.
Death Rates for Breat Cancer and Lung Cancer