health and disease
- Created by: GraceYoung
- Created on: 31-08-18 12:49
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- health and disease
- the world health organisation defines health as 'a state of complete physical, mental and social wellbing'
- types of diseases
- Communicable
- they can be passed from one person to another
- rapid variation in number of cases over time
- cases are often localised
- e.g malaria, typhoid and cholera
- non-communicable
- not passed between person to person
- number of cases only change gradually
- cases may be more widely spread
- e.g cancer, diabetes and heart disease
- Communicable
- pathagens
- when a few pathogens infect you they can produce rapidly
- large numbers of pathogens make you ill
- bacteria may release toxins that make you feel ill. some bacteria invade and destroy body cells
- viruses take over a body cell's DNA causing the cell to make toxins or causing damage when new viruses are released
- fungi are eukaryotic organisms
- protists are eukaryotic organisms. many are free living but some are pathogens
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