The basics of UV sun rays

The first 200 words of this essay...

Cancer in general

Cancer is a non-communicable (non-infectious) disease, in other words it is not caused

by pathogens. Cancer is caused when abnormal cells in the body divide by mitosis in

an uncontrolled way by using the enzyme telomerase; this gives rise to tumours and, if

the cells are malignant, cancers. Cancer is a major cause of death in the developed

world. In 1999 7.3 million people worldwide died from cancers. In high income

European countries cancer is known as the second biggest killer. There are over 200

different cancers. The most common cancers are lung cancer and skin cancer.

There are about 42.2 new cases of lung cancer reported in the UK per 1000 people

each year and 5 new cases of skin cancer reported per 1000 people in the UK each

year - and many cases go unreported. It is difficult to treat cancer because there are

many different cancers. There are some common characteristics between them though;

one being the presence of unregulated cell growth leading to the development of

tumours. Not all