question: What are tiny hairs that line the bronchi called?
distractor3: flagella
distractor1: antennae
distractor2: alveoli
correct_answer: cilia
support: In the chest, the trachea divides as it enters the lungs to form the right and left bronchi. The bronchi contain cartilage, which prevents them from collapsing. Mucus in the bronchi traps any remaining particles in air. Tiny hairs called cilia line the bronchi and sweep the particles and mucus toward the throat so they can be expelled from the body.