NEET BIOLOGY

Detailed explanation-1: -Ciliated cells usually have hundreds of cilia on their surfaces. Epithelial cells lining your respiratory tract have cilia that trap dust and other substances you breathe in and move them toward your nostrils so that they don’t go into your lungs.

Detailed explanation-2: -Due to the movement of the cilia in ciliated columnar epithelium, this type generally plays a role of clearing or moving substances or very small foreign bodies. Ciliated columnar epithelium is therefore found in the respiratory tract where mucous and air are pushed away to clear the respiratory tract.

Detailed explanation-3: -The main function of simple columnar epithelial cells are protection. For example, the epithelium in the stomach and digestive tract provides an impermeable barrier against any bacteria that could be ingested but is permeable to any necessary ions. This function is especially important in the colon.

Detailed explanation-4: -The ciliated part of the simple columnar epithelium has tiny hairs which help move mucus and other substances up the respiratory tract.