fighting disease

• Physical barrier prevents entering of pathogens
• chemical barrier is a chemical that prevents entry of pathogens
• Hair and mucus in nose trap particles.
• Skin and blood, if skin is damaged blood will clot to avoid pathogens getting into blood stream.
• Cells in trachea and bronchi(lung airways) produce mucus.
• Cilia wafts mucus up throat where it can be swallowed and destroyed by hydrochloric acid in stomach.
• Hydrochloric acid in stomach is chemical barrier
• Eyes produce chemical ‘Lysozyme‘ that kills bacteria that lines eyeline