Orcee

Human body is made up of organs. An organ is a structure that contains at least two different types of tissues functioning together for a common purpose.  There are many different organs in the body: the liver, kidneys, heart, even your skin is an organ. Tissues are again made up of Cells, the body’s basic unit and the smallest part of an organ. All cancers begin in cells. The body is made up of different types of cells.

To keep the function of the body proper cells grow by dividing and multiplying itself in a controlled way. This is an automatic process and done by the body as they are needed. In a normal process old cells die and they are replaced by new cells. But sometimes due to many reasons the DNA, the primary component of a cell, becomes damaged or changed and produces mutations that hampers the normal division and multiplication of a cell. And then the cells that should die remain alive. The formation of news cells continue even if the body does not need them. Then there is an accumulation of extra cells that forms a mass of tissue known as tumor.

All tumors are not cancers. There are two types of tumor – benign or malignant.

Benign Tumors are non cancerous. They can be removed. Most of the time they are not life threatening and do not spread to other parts of the body.

Malignant tumors are cancerous. In this case Cells have the ability to spread and affect adjacent tissues and organs. Sometimes the cancerous cells enter into the blood stream and spread the disease to other organ. The spread of cancer from one part of the body to another is called metastasis. 

Types of Cancer

Cancer is a group of diseases and there are almost 100 different types of cancers. They are classified by the type of cell that resembles the tumor. The main categories are:

· Carcinoma – cancer that begins in epithelium tissues, the tissues composed of layers of cells which line the cavities and surfaces of structures throughout the body. It is also a type of tissue that forms many glands. The outermost layer of our skin is composed of dead stratified squamous, keratinized epithelial cells. the skin or in tissues that line or cover internal organs.

· Sarcoma – cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue.

· Leukemia – cancer that starts in blood-forming tissue such as the bone marrow and causes large numbers of abnormal blood cells to be produced and enter the blood.

· Lymphoma and myeloma – cancers that begin in the cells of the immune system .

Central nervous system cancers – cancers that begin in the tissues of the brain and spinal cord

Author: Jacob

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