B2 Health and disease

Organisms health can be affecteed by disease 

Healthy organism- state of well being/functioning as it should mentally and physically

Disease- condition that commonly damages cells of host and impares the normal structures or functioning of organism.


  • organism infected by pathogen 
  • mutation in oganisms genes 
  • organism affected by environmental conditions 
  • experience trauma(emotional shock/ physical ingury) affect health.
  • Lifesyle.


COMMUNICABLE-spread between organisms. Caused by pathogens infecting organism. 

NON COMMUNICABLE-not spread from organism to another.generallly last for long time, progress slowly.Associated with geetic mutations, lifestyle and environmental factors.

Both cause symptoms. e.g. symptom of multiple sclerosis


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