Among the variety of different types of cancer, one of the most common is lung cancer; the environment in which people live in the 21st century greatly contributes to the development of this type of cancer. The first and the most popular cause of lung cancer is smoking cigarettes.
Cancer is one of the most important non-infectious or non-communicable diseases. Out of them two lakhs of people die. It is mainly due to late detection.
Many people are not aware of the early symptoms of this disease.
The growth of multicellular animals occurs due to addition of new cells. The old or existing cells divide by mitosis to form new cells. This division is controlled and regulated by some factors. Sometimes, due to unknown reasons, some cells divide in abnormally faster rate to form a lump.
This lump increases rapidly causing ulcers. It causes serious complications in the body. These abnormal cells first destroy the organ and then the whole body. These cells utilize the total food of the body.
So the affected person becomes weak, looses his weight and ultimately dies. The tumors, enclosed in connective tissue are called benign tumor and when the tumors grow, it is called as malignant.
Cancer can be divided into different types: The cancer which occurs in muscles, cartilages, bones, blood vessels, connective tissues are known as sarcoma.
This type of cancer originates from skin or cells which lines the internal organs. It is the cancer of lymph glands and lymph nodes. It occurs in blood forming organs, specially the bone marrow. It is found that no organ of body and no species is free from cancer. The real cause of cancer is not yet known.
The following aspects can be attributed to the cause of cancer: Excessive smoking has been found to be associated with lung cancer, cancer in urinary bladder, mouth, throat, larynx etc. Chewing of tobacco, betel nuts etc. A large number of dyes, chemicals, heavy metals can cause cancer.
Ionic radiations like X-ray, gamma ray etc. Alcohol is thought to be the cause of cancer in stomach, liver, gall bladder etc. Pollutants like chemicals, smoke, dust may be responsible for cancer. Though the exact cause of cancer is not known, the above described substances are mutagens which can cause mutation in genes.
The mutant genes have no control over normal functioning of the cell. So it may lead to cancer. Though cancer can develop at any part or organ of the body, it mostly develops in some organs like liver, alimentary canal, larynx, pharynx, tongue, lips, gall bladder, lungs, uterus, urinary bladder, lymph nodes, bones etc.
Primary Symptoms of Cancer: Presence of any persistent lump or thickening of tissues in lip, tongue or breast. Any wound that does not heal. Unusual bleeding or discharge of blood. Persistent indigestion, difficulty in swallowing.Oct 30, · Best Answer: Cancer is caused by factors (radiation, chemicals, viruses) modifying the cells DNA to an extent where the cell starts to divide rapidly and uncontrollably (hence the tumor).
I recommend reading an essay on tumor cell biology and then adapting the Status: Resolved. What causes lung cancer? of lung cancer even after the effects of concomitant of developing a second lung cancer.
Survivors of non-small cell lung cancers have an added risk of 1%-2% per. Lung malignant neoplastic disease itself is the taking cause of malignant neoplastic disease deceases worldwide (estimated at around 30 % of the sum), both in work forces and adult females, in front of the figure of deceases from – combined – chest, colon and prostate malignant neoplastic diseases.
Essay on Cancer: Types, Causes and Treatment. Excessive smoking has been found to be associated with lung cancer, cancer in urinary bladder, mouth, throat, larynx etc.
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Feb 08, · Lung cancer in non-smokers can be caused by exposure to radon, secondhand smoke, air pollution, or other factors. Workplace exposures to asbestos, diesel exhaust or certain other chemicals can also cause lung cancers in some people who don’t smoke. Cancer is caused by several environmental factors such as exposure to air pollution and Rn ; nevertheless, the chief cause of lung malignant neoplastic disease is still the ingestion of nicotine, which is the chief constituent of coffin nails.