Pseudostratified epithelium lines the ................ tract while transitional epithelium lines the ............... tract.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Pseudostratified Epithelium**:
- Pseudostratified epithelium is a type of epithelial tissue that appears to be stratified (layered) due to the varying heights of its cells, but is actually a single layer.
- It is primarily found in the respiratory tract, where it plays a crucial role in trapping and moving particles out of the airways due to the presence of cilia.

2. **Identifying the Function of Pseudostratified Epithelium**:
- The cilia on the surface of pseudostratified epithelium help in the movement of mucus and trapped particles out of the respiratory tract, thus keeping the airways clear.
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