Disease
- Created by: Katie
- Created on: 19-11-12 20:07
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- Disease and the immune system
- Physiology is the study orf how the body's tissues, organs and systems work.
- Disease is the general term meaning a disorder of the body.
- Some pathogens are more harmful than others, they have a greater pathogenicity or virulence
- Infectious diseases are cause by pathogenic organismas living in or on the body and so causing harm e.g.TB, AIDS
- Dietary deficiency diseases are cause by a lack of specific nutrients in the diet
- Environmental diseases are caused by non living factors in the environment. They include skin cancer, lung cancer, asthma
- Social diseases are caused by human activities and lifestyle. e.g. alcholism, anorexia, drug addiction
- ageing diseases are caused by degeneration of body tissues and include arthritis and cataracts
- Genetic diseases are caused by genes inherited from parents e.g. cystic fibrosis, haemophilia. Influenced by only the action of a single allele and are not influenced by any other factor.
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