Essay about Cancer: Epidemiology and Cancer Biology Body

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Shawn Bee Coach Bell Cancer Biology
Cancers are a large family of diseases which cause abnormal cell growth with the potential to invade or spread to other parts of the body
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There are more than 100 types of cancer, including breast cancer, skin cancer, lung cancer, colon cancer, prostate cancer, and lymphoma
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Cancer cells can spread to other parts of the body through the blood and lymph systems
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The body is made up of many types of cells
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These cells grow and divide in a controlled way to produce more cells as they are needed to keep the body healthy
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When cells become old or damaged, they die and are replaced with new cells
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However, sometimes this orderly process goes wrong
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DNA of a cell can become damaged or changed, producing mutations that affect normal cell growth and division
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When this happens, cells do not die when they should and new cells form when the body does not need them
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The extra cells may form a mass of tissue called a tumor .
Tumors can grow and interfere with the digestive, nervous, and circulatory systems, and they can release hormones that alter body function
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Tumors that stay in one spot and demonstrate limited growth are generally considered to be severe
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More dangerous, or malignant, tumors form when two things occur a cancerous cell manages to move throughout the

Shawn Bee Coach Bell Cancer Biology body using the blood or lymph systems, destroying healthy tissue in a process called invasion that cell manages to divide and grow, making new blood vessels to feed itself in a process called angiogenesis
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The great majority of cancers, some 90­95% of cases, are due to environmental factors
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The remaining 5­10% are due to inherited genetics. Environmental, as used by cancer researchers, means any cause that is not inherited genetically, such as lifestyle, economic and behavioral factors, and not merely pollution
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Common environmental factors that contribute to cancer death include tobacco 25­30%, diet and obesity
30­35%, infections 15­20%, radiation both ionizing and nonionizing, up to 10%, stress, lack of physical activity, and environmental pollutants
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Most cancers are initially recognized either because of the appearance of signs or symptoms or through screening . Most people are distressed to learn that they have cancer
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They may become extremely anxious and depressed
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The risk of suicide in people with cancer is approximately double the normal risk
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Cancers that are closely linked to certain behaviors are the easiest to prevent
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For example, choosing not to smoke tobacco or drink alcohol significantly lower the risk of several types of cancer, most notably lung, throat, mouth, and liver cancer
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Even if you

Shawn Bee Coach Bell Cancer Biology are a current tobacco user, quitting can still greatly reduce your chances of getting
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