Question

give function: cilliated epithelium lining the respiratory tract

Answer 1

ciliated epithelium secretes mucous in the inner lining of the tract to prevent entry of foreign objects, like dust particles, in the tract

Answer 2

the ciliated epithelium layer in trachea secrets mucus which prevent the dust particles or any microorganisms or any debris present in the inhaled air from entering the trachea or our body..

hope it helps