Human defence systems

• What does the nose contain to trap pathogens?

  Hairs and mucus
• How does the skin contribute to the human defense system?

  It acts as a barrier and produces antimicrobial secretions
• What is covered in microorganisms in the mouth?

  • Produces saliva
  • Contains mucus to trap pathogens
• What does the stomach contain that helps in the defense against pathogens?

  Hydrochloric acid and enzymes
• What is phagocytosis?

  It is when a white blood cell ingests and digests a pathogen
• What role do antibodies play in the immune system?

  They attach to antigens on pathogens and aid in their destruction
• What can antitoxins do in the immune response?

  They can counteract or neutralize toxins released by pathogens
• What are the main components of the human defense system?

  1. Nose: Hairs and mucus trap pathogens
  2. Skin: Barrier and antimicrobial secretions
  3. Mouth: Saliva and mucus trap pathogens
  4. Stomach: Hydrochloric acid and enzymes
  5. Immune system: Phagocytosis, antibody production, and antitoxin production