Cancer is a disease in which cells become abnormal and form more cells in an uncontrolled way. With breast cancer, the cancer begins in cells that make up the breasts—usually in the tubes that carry milk to the nipple or the glands that make milk. The cancerous cells form a mass of tissue called a tumor. Sometimes, the cancer spreads to other parts of the body.
2) What is skin cancer?
Cancer is a disease in which cells become abnormal and form more cells in an uncontrolled way. With skin cancer, the cancer begins in cells that make up the skin. The skin is the body's largest organ. It protects us against heat, light, injury, and infection. It regulates body temperature and stores water, fat, and vitamin D. With skin cancer, new cells form when the skin does not need them, and old cells do not die when they should. These extra cells form a mass of tissue called a tumor. Not all tumors are cancer. Tumors that are cancer can invade and damage nearby tissues and organs, and sometimes can spread to other parts of the body.
Source for question #’s 1 and 2
http://www.4woman.gov/faq/
3)The generally accepted definition of health is "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity
http://en.wikipedia.org/wiki/Health
4) how much can not being healthy affect the duration of life?
Feeling good, looking fit, and leading a long and healthy life are things most of us want. Well, there’s a lot we can do to increase the chance that we’ll have them. The beneficial effects—both physical and mental —of good nutrition, physical fitness, and exercise are proven. You’re never too young, too old, or too out of shape to get started— you can benefit from regular physical activity and healthy eating habits.
http://www.pueblo.gsa.gov/cic_text/health/fitnexer/fitnexer.htm
5) How To Maintain a Healthy Lifestyle?
Listen to music!!!
http://stress.about.com/od/lowstresslifestyle/a/daily_music.htm
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