Unit 2 Section 5.1 Defining Health and Disease

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  • Defining Health and disease
    • What is Health
      • Health is a state of physical, mental and social well - being, which includes the absence of disease and infirmity
      • To be healthy you need to eat nutritious food, so you're not malnourished and have shelter - these things help to maintain health because they help you to avoid disease
    • What is disease
      • Disease is a condition that impairs the normal functioning of an organism. Diseases can be infectious, non - infectious, acute or chronic
      • Infectious Disease
        • can be passed between individuals. They're caused by infection with pathogens or parasites
        • A pathogen is an organism that can cause disease
        • A parasite is an organism that lives on or in another organism and causes damage to that organism Some parasites cause disease so they're also pathogens
      • Non Infectious Disease
        • Non - Infectious diseases are caused by genetic defects, nutritional deifcienties lifestyle and environmental factors
      • Acute and Chronic Diseases
        • Diseases can also be classed as acute or chronic
        • Acute diseases usually only cause a problem for a short period of tine and the symptoms usually appear rapidly
  • Chronic diseases are much more persistent and the symptoms often appear very slowly but get progressivly worse as time goes on
    • Acute and Chronic Diseases
      • Diseases can also be classed as acute or chronic
      • Acute diseases usually only cause a problem for a short period of tine and the symptoms usually appear rapidly

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