EVERYDAY SCIENCE

Detailed explanation-1: -The epithelium contains goblet cells, one of the specialized, columnar epithelial cells that produce mucus to trap debris. The cilia of the respiratory epithelium help remove the mucus and debris from the nasal cavity with a constant beating motion, sweeping materials towards the throat to be swallowed.

Detailed explanation-2: -The epithelial lining of the trachea is a pseudostratified columnar respiratory epithelium consisting of ciliated and clara cells.

Detailed explanation-3: -The larynx and trachea are lined by pseudostratified ciliated epithelium (ie, respiratory epithelium), with interspersed mucin-containing cells with apical blebs. The laryngeal and tracheal epithelium is similar to the respiratory epithelium of the nasal passages.

Detailed explanation-4: -Goblet cells produce a sticky substance called mucus. When you inhale, the mucus traps dust or other small debris to keep it from traveling to your lungs.

Detailed explanation-5: -Each epithelial cell has around 200 cilia that beat constantly at a rate of between 10 and 20 times per second.