Defence systems

• How does the trachea & Bronchi help defend viruses?

  mucus - Traps pathogens

  Cilla - beat to waft mucus up to back of throat for swallowing
• How does the skin defend against viruses?

  physical barrier - blocks pathogens

  antimicrobial secretions - destroy pathogens
• How does the nose stop from viruses coming in?

  Hair - Traps pathogens

  Mucus - Traps pathogens
• How does the stomach protect the body from viruses?

  Hydrochloric acid destroys pathogens from food and swallowed mucus