A ciliated version of pseudostratified columnar epithelium containing mucus- secreting goblet cells is called respiratory epithelium, and it lines most of the respiratory tract.
Explanation
- This epithelium consists of irregularly sized columnar cells with cilia on their apical surface that help in moving mucus and trapped particles out of the airways.
- The goblet cells within this epithelium secrete mucus, which traps foreign particles and helps keep the respiratory tract moist and protected.
- The combination of cilia and mucus plays a crucial role in protecting the respiratory system by clearing inhaled debris and pathogens, ensuring clean air reaches the lungs.
- Respiratory epithelium is found lining most parts of the respiratory tract, including the nasal cavity, trachea, and bronchi (but not the larynx or pharynx).
Thus, the best fit for the statement is that this epithelium lines most of the respiratory tract.
