Cancer is primarily caused by cells that grow without messy to die, cells follow the natural course of growth regulator then split and after death. The process of cell death called a programmer (scramble).
Differ when this process begins to take shape cancer. Unlike normal cells, cancer cells do not suffer from programmed death but continue to grow and divide and this leads to the emergence of a mass of abnormal cells that grow without subject to any control.
Cells may be exposed to the growth of the chaotic when decayed or Attefr the DNA and thus genes injury (genes) responsible for cell division. There are four main genes responsible for cell division (tumor genes) order the cell to divide, and (genes inhibit tumor) order the cell not to divide, (self-death genes) controlling apoptosis and order the cell to kill itself if something goes wrong, and (DNA repair genes) directed the cell to repair DNA Almtakrb.
Cancer occurs when cell become as a result of mutations that affect genes unable to correct the imbalance, which affects the DNA and thus is able to self-death, and similarly, the cancer is caused by mutations that inhibit the action of tumor genes and inhibit tumor.
However, cancer can result from (genetic predisposition) inherited from the parents, it is possible to generate human existence mutations or imbalances in Morthath making it more likelihood of cancer.
Carcinogens: A row of materials, which are directly responsible for the sabotage of DNA and to allow for the emergence of cancer or help him, smoking, asbestos (asbestos), arsenic, radiation gamma and X-ray rays and the sun and some of the material in the smoke all cars are examples of carcinogens ..
When our bodies are exposed to carcinogens formed free radicals which pulls electrons from other molecules of the body, these free radicals damage cells and affect their ability to perform their functions normally.
Also, the more we age, the number of possible cancer-causing mutations that may afflict the DNA which makes life a serious factor is becoming increasingly important factors of cancer, many viruses also proved they relate to cancer Kveros papillomavirus (causes cervical cancer) and HIV infection hepatitis B and C (causing liver cancer) and Aastein-Barr virus (causing some cancers of the children) and human immunodeficiency virus (HIV) in addition to every worker inhibits or weakens the immune system.
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