Skin Cancer :: essays research papers

peel off Cancer Cancer is a word used to describe a group of diseases. apiece has its own name, its own treatment, and its own chances of being cured. Each is different from the some opposites in many ways, but every crabmeat, whatever its c each(prenominal)ed or whatever part of the re importants it is located in, is a disease of the bodys cells. The millions of tiny cells that make up the human body be so small that they can be seen only by facial expression through a microscope. There are different kinds of cells, but they all make freshly cells by dividing into two. This is how worn-out, old cells are replaced with strong new ones. When a cell changes and doesnt do the job it should do for the body, it awards into more(prenominal) cells like itself, then these cells keep dividing into more cells. A group of these cells is a tumour. There are two kinds of tumors. A benign tumor is not cancer. The cells of a benign tumor can crowd out ample cells, but they cannot spre ad to other parts of the body. A malignant tumor is cancer. Like a benign tumor, it can take over other healthy cells around it, but it can also spread to other parts of the body. To do this, a cell or group of cells from the tumor breaks away and moves, usually though the blood, to other parts of the body. There they divide and start tumors made of malignant cells like the ones that made up the graduation tumor. When this happens, it is called metastasis. Skin cancer is the most prevalent of all cancers, and its increasingly common. About a million Americans will develop disrobe cancer this year. It is a disease in which cancer cells are found in the outer beds of skin. Skin protects the body against heat, light, infection, and injury. It also stores water, fat, and vitamin D. The skin has two main layers and several kinds of cells. The top layer of skin is called the epidermis. It contains three kinds of cells flat, scaly cells on the surface called squamous cells, round cells c alled basal cells, and cells called melanocytes, which give skin its color. The inner layer of skin is called the dermis. This layer is thicker, and contains blood vessels, nerves, and sweat glands. The hair on skin also grows from tiny pockets in the dermis, called follicles.