The body is comprised of hundreds of millions of cells which normally grow, divide, and die respectively. Initially, cells divide quickly assisting in the growth process. As people age, cells divide as a means of replacing worn or dying cells.
Although there are numerous types of cancer all begin due to rapid growth of abnormal cells. Instead of dying off, these abnormal cells continue to grow, forming new cells which are also abnormal. Aside from this, cancerous cells are also capable of invading other healthy tissues, whereas normal cells cannot.
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