What´s the Exact Cause of Cancer?

2203 WordsJan 27, 20189 Pages
Cancer is a disease where there is uncontrolled cell division and surrounding tissues are invaded. This invasion occurs by a process called metastasis; cells grow directly into surrounding tissues and are transferred through the bloodstream or lymphatic system. These rapidly growing cells are supported by angiogenesis, the growth of new blood vessels from old ones, which helps supply the cells with nutrients. Cancer results from cell mutations which stem from DNA damaged during the cell cycle. These mutations are in genes that encode for proteins that control cell division. The uncontrolled division of cells results in the growth of benign tumors or malignant tumors. Benign tumors do not undergo the process of metastasis and are seldom life-threatening. Malignant tumors do undergo metastasis and are very life-threatening. The exact causes of cancer are still undetermined, but there are many things that raise the chances. Smoking and drinking has been linked to many cancers such as lung, mouth throat, bladder, and kidney cancer. Radiation and too much exposure to sunlight can also lead to cancer. It is known that changes in cells cause cancer but what causes these changes are unknown. The cell cycle is the link between the unknown cause and cancer. The cell cycle is the cycle of cell growth, replication of the genetic material and division into equal daughter cells. The cell cycle consists of interphase and mitosis. Interphase has three steps; G1, S, and G2
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