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 Cancer is a disorder in which some of the body’s own cells lose the ability to control growth.  Cancer cells do not respond to the signals that regulate.

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Presentation on theme: " Cancer is a disorder in which some of the body’s own cells lose the ability to control growth.  Cancer cells do not respond to the signals that regulate."— Presentation transcript:

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2  Cancer is a disorder in which some of the body’s own cells lose the ability to control growth.  Cancer cells do not respond to the signals that regulate the growth of most cells.  They divide uncontrollably and form masses of cells called tumors.  Cancer cells can break away from tumors and spread to other parts of the body.  Benign Tumors will not kill you.  Malignant Tumors will kill you.

3  Tobacco  Radiation Exposure  Viral Infections Some cancer cells will no longer respond to external growth regulators, while others fail to produce the internal regulators that ensure orderly growth.

4  Defects in genes.  Inherited  Chemicals – Nicotine or Asbestos Important term to know! Carcinogen- Chemical compound that caused cancer. A lot of carcinogens are found in cigarette smoke.

5  Cancer divides uncontrollably and destroy health tissue.  All forms or cancer are ultimately caused by harmful mutations in genes that control cell growth and development.  Environmental factors damage DNA.  Can be inherited.  Usually starts with a single cell. Then it spreads.  Cancer cells spread and absorb nutrients needed by other cells. This kills good body cell.

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