health and disease

• Health is the state of physical, mental and social well-being.
• Communicable disease can be transferred from one organism to another.
• Disease is a condition that is caused by a pathogen and results in a loss of health.
• Non-communicable disease is a disease that cannot be spread from person to person.
• Immune system protects body from pathogens.
• Phagocyte response is the process of phagocytosis, which is the process of engulfing and digesting foreign particles.
• Lymphocyte response is a long term, highly specific and targeted response involving antibodies.
• 1. A phagocyte detects a pathogen.
  2. Phagocyte binds to pathogen.
  3. Phagocyte engulfs pathogen and encloses it into a vesicle called a phagosome.
  4. Phagosome secretes digestive enzymes called lysosomes. Lysosomes break down pathogen.
  5. Debris is secreted.