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Unformatted text preview: invade neighboring tissues and organs. Cancer cells have the ability to penetrate the lamina. The cells are able to invade and destroy neighboring tissue. A benign tumor does not invade neighboring tissue. Angiogenesis Tumors need a blood supply for food and oxygen. Cancer cells release growth factors that cause nearby blood vessels to produce branches that grow into the cancerous tissue. Immune System The immune system can recognize foreign cells and invaders (bacteria, viruses, etc.) because they have proteins and other structures that are different from the bodys "self" markers. Cancer cells may have mutated "self" markers and are often destroyed by the immune system....
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- Fall '10