what is the missing word? __________ cells move mucus and dust particles out of the trachea.

Ciliated cells are the ones that move mucus and dust particles out of the trachea.

How They Work

These specialized epithelial cells line the trachea and have hair-like structures called cilia on their surface. The cilia beat in a coordinated, wave-like motion to propel mucus upward toward the throat, clearing debris and pathogens.

This process, known as the mucociliary escalator, protects the lungs from harmful particles.

Why It Matters

• Dust and mucus trapping : Goblet cells produce mucus that captures particles, while ciliated cells sweep it away.

• Respiratory health : Damage to cilia (e.g., from smoking) impairs clearance, raising infection risk.

• Everyday protection : Inhaled pollutants meet this defense daily, preventing irritation.

"Ciliated Cells: These specialized cells... help to move mucus, which traps dust particles... upwards towards the throat."

TL;DR : The missing word is ciliated. Information gathered from public forums or data available on the internet and portrayed here.