Essay on Cancer and the Body

1640 Words Apr 11th, 2011 7 Pages
Cancer and the Body
Krystal Medley
Lincoln Technical Institute

Abstract
Cancer is one of the leading causes of death in the world today. Studies show that one in three people will suffer from some form of cancer in their lifetime. There are many different kinds of cancer that effect different parts of the body. Cancer is treated in various different ways. Some forms of cancer are curable and some are not, but with the continued research we can hope to someday find a cure.

Cancer and the Body
Cancer is a class of diseases characterized by out-of-control cell growth. There are over one hundred different types of cancer, and each is classified by the type of cell that is initially affected. Cancer harms the body when damaged cells
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The effect that is has is tumor development, which causes cells to mutate so that they are not all identical and have differing sensitivities to treatment.
Metastasis is the process in which a tumor develops in internal blood vessels. Tumor cells extend into normal tissue by producing enzymes that dissolve substances that hold normal cells together. The tumor then penetrates capillaries and other structures and cavities within the body. The tumor cells are then transported through the body, but most are destroyed by the body’s defenses. The remaining tumor cells are trapped in capillary beds and form a fibrin meshwork that prevents detection by the immune system. Enzymes dissolve the lining of the blood vessels and cells invade the surrounding tissue. Cells attempt to establish blood supply to support the development of metastatic colony, and from there transformed cells relocate by direct extension, invasion and establishment of remote sites.
Benign tumors are relatively harmless, because they do not spread to other parts of the body. This type of tumor presents problems if they put pressure on or obstruct blood flow to and from other organs or blood vessels. Benign tumors usually have a slow growth rate. When they begin to grow, they are large and expand. These cells closely resemble those of the tissue of origin. After removal, recurrence of these tumors is highly unlikely

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