There are many cause of diseases. Infectious diseases are caused by the invasion of tiny microorganisms, such as bacteria and virus, which enters the body and multiply to huge numbers. Some of the symptoms of these diseases are caused by the toxins that are produced by the microbes. Some signs, such as fever and swelling, are actually part of the defenses against infection.
Not all disease are results of infection. There are also Noninfectious diseases that are usually the result of something going wrong with the organs or functions of the body. in immunological diseases, for example, the immune system is working improperly. They may turn against the body's own cells, damaging them instead of protecting them. Some infectious disease are hereditary, diseases that are passed on from parents to children. There are also congenital disease (i.e. congenital heart disease), which means that they are present by birth.. Diseases of the body's chemistry can be caused by endocrine system disorders involving body hormones. In degenerative diseases, various parts of the body break down and lose their ability to work normally. In neoplastic diseases, including the many forms of cancer, the process of cell growth and reproduction run wild and form tumors.
Failure to eat a balanced diet or conditions in which the body is unable to use certain foods properly may result in nutritional diseases. Chemicals in the air, water and food as well as radiation, noise, and other influences that can affect people at home or at work may have damaging effects on the body. They can produce various occupational and environmental diseases. Mental and Emotional diseases, such as depression, may be the result of disorders in the body or influences in the environment. The mind can also have positive and negative effects on the health of the body.
Not all disease are results of infection. There are also Noninfectious diseases that are usually the result of something going wrong with the organs or functions of the body. in immunological diseases, for example, the immune system is working improperly. They may turn against the body's own cells, damaging them instead of protecting them. Some infectious disease are hereditary, diseases that are passed on from parents to children. There are also congenital disease (i.e. congenital heart disease), which means that they are present by birth.. Diseases of the body's chemistry can be caused by endocrine system disorders involving body hormones. In degenerative diseases, various parts of the body break down and lose their ability to work normally. In neoplastic diseases, including the many forms of cancer, the process of cell growth and reproduction run wild and form tumors.
Failure to eat a balanced diet or conditions in which the body is unable to use certain foods properly may result in nutritional diseases. Chemicals in the air, water and food as well as radiation, noise, and other influences that can affect people at home or at work may have damaging effects on the body. They can produce various occupational and environmental diseases. Mental and Emotional diseases, such as depression, may be the result of disorders in the body or influences in the environment. The mind can also have positive and negative effects on the health of the body.
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