Mucus and Cilia

• What is the function of mucus in the respiratory system?

  To protect the respiratory system by trapping dust and microorganisms
• What are cilia?

  Small, hair-like structures on the cells lining the trachea and bronchi
• How do cilia contribute to the respiratory system?

  They move back and forth to push mucus up toward the trachea
• What happens to mucus after it is pushed up by cilia?

  It is swallowed and removed from the body via the digestive system
• Where is mucus found in the respiratory system?

  In the trachea and bronchi
• What would happen if there were no cilia in the trachea?

  Mucus would not be effectively moved out of the respiratory system
• How does mucus protect the lungs?

  It traps dust and microorganisms, preventing them from reaching the alveoli
• What is the journey oxygen takes from the mouth to the blood?

  Air enters via mouth/nasal cavity, down trachea, into bronchi, then bronchioles, and finally into alveoli
• What adaptations do alveoli have for gas exchange?

  • Good blood supply
  • Moist surface to dissolve oxygen
  • One cell thick for efficient diffusion
• What are alveoli?

  Air sacs at the end of bronchioles
• What is the role of alveoli in the respiratory system?

  They allow gas exchange between air and blood
• How does carbon dioxide move in the alveoli?

  It moves from the blood into the alveoli
• What is the maximum score for the oxygen journey exercise?

  15 points
• What could damage the cilia in the trachea?

  Exposure to smoke or pollutants
• What is the date of the lesson on mucus and cilia?

  9 November 2022
• What is the significance of the cilia's movement?

  It helps to clear mucus and trapped particles from the respiratory tract
• Why is it important for the respiratory system to protect against particles and bacteria?

  To prevent damage to the delicate alveoli and ensure efficient gas exchange