Diseases

• Examples of non communicable diseases

  • Diabetes
  • heart disease
  • liver disease
  • cancer
• Communicable disease 


  Caused by a pathogen and can be passed from person to person
• Non-communicable 


  Caused inside body and cannot be passed from person to person
• Pathogen


  A diseased causing organism
• 4 types of pathogen

  • Bacteria
  • Virus
  • Fungus
  • Protists
• How can pathogens spread

  • Direct contact
  • water
  • air
  • unhygienic food preparation
  • vectors
• viral disease

  • TMV
  • HIV
  • measles
• bacterial disease

  • gonorrhoea
  • salmonella
• Fungal disease

  • Athlete’s foot
  • Rose black spot
• Protist disease 


  Malaria
• How do bacteria make you ill 


  Produce toxins that make you ill
• How do viruses make you ill 


  Rapidly repoducing inside cells damaging and destroying them
• The term for an organism that spread disease by carrying pathogens between people? 


  Vector
• physical barriers

  • Skin
  • Nose
  • tranchea
• Chemical barriers

  • Eyes - Lysozymes
  • stomach - hydrochloric acid
  • Genitals
• Eyes have enzymes that react with bacterial cell walls and cause them to break down
• only a few type of bacteria are adapted to survive in the acidity of the stomach acid
• State the part of the body containing strong acid to kill pathogens


  Stomach
• State the part of the body that secretes mucus to trap pathogens stoppinf them from entering the lungs 


  Nose

  tranchea

  bronchus