Question

What is the function of the cilia in the repiratory tract of human beings?

• A. Protect the epithelial cells from the inhaled air.
• B. Increase surface area for the absorption of oxygen
• C. Produce sweeping movements to remove excess mucus.
• D. Provide structural support and stabilise the respiratory tract

Answer 1

The correct option is C Produce sweeping movements to remove excess mucus.

• The ciliated epithelium is an epithelial tissue which possesses tiny hair-like structures on the surface called cilia.
• The cilia exhibits back and forth movement which helps to move the particles.
• The ciliated epithelial tissue present in the respiratory tract helps to propel the mucus that covers the air tracts.
• The mucus layer traps the microorganisms and other foreign particles that have entered the respiratory tract and prevents it from reaching the lungs.
  
• So, the correct answer is C.