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Cancer and biology Essay Example

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Cancer and biology

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Apparently, the tumors in their original sites are responsible for only ten per cent of cancer fatalities. The metastatic disease can be prevented when mechanisms are adopted to stop the cancer cells from sticking to body tissues. This can stop the growth tumors in the secondary states (Bozzone, 2007).Cancer results from the uncontrollable growth cells that are not fatal. Ordinary cells follow the normal path of growth, division, and death. The demise of cells in a planned way is called apoptosis. The breaks down of this program lead to the formation of cancer. It is clear that cancer cells do not undergo programmed deaths as other regular cells. They instead keep up with growth and continue to grow. This culminates in the formation of a network of abnormal cells whose growth is out of control. However, most of the causes of cancer come from external interventions. The main causes of cancer are related with the environmental risk factors like radiations. When one exposes himself to radiations of high levels such as x-rays and therapies, the normal body cells are damaged. This increases the dangers of acquiring leukemia, breast cancer, thyroid cancer, and stomach cancer. Besides, the ultraviolet radiation that originates from the sun culminates in skin cancer that damages the melanoma. The harmful rays from the sun can cause early aging and skin damages (Bozzone, 2007).The other causes of cancer are viruses, chemicals, tobacco, alcohol, and poor diet. Viruses such as human papillomaviruses (HPV), Epstein Barr virus, hepatitis B and C are responsible for causing infectious mononucleosis that increases the risks of acquiring cancer. Additionally, diseases that affect the immune body system of the body such as AIDS make the body vulnerable to cancers. Additionally, chemicals such as asbestos, radon, nickel, uranium, pesticides, and the benzene also enhance the risks of acquiring cancer. Some chemicals contain carcinogens that either act alone or upon combination with other carcinogens found in cigarette smoke to increase the chances of acquiring cancers and other diseases of the lung (Master, 2003).Smoking cigarette and regularly exposing oneself to tobacco increases the risk of lung cancer. One who smokes cigarette regularly increases their chances of developing other types of multiple cancers. These cancers might attack larynx, pancreas, kidney, esophagus, larynx, bladder, and

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