ANATOMY

Detailed explanation-1: -The conducting zone is lined with hair-like structures called cilia that are covered in mucus, which helps trap potentially dangerous materials. Cilia are mobile, tiny, finger-like projections on the surface of airway cells. Cilia line the airways and help move mucus up and out of the lungs [5].

Detailed explanation-2: -In the trachea’s inner layer, you have small, hair-like structures called cilia. Cilia move in rhythm to push mucus out of your trachea so that you either expel or swallow it.

Detailed explanation-3: -These motile cilia have a continual, rhythmic beating motion which pushes secretions from the peripheral to the central airways via the trachea to the throat where they are swallowed or expectorated (hence the term “escalator”). This layer is less viscous than the gel layer, allowing the cilia to beat freely.

Detailed explanation-4: -The trachea is also lined with cilia, which sweep fluids and foreign particles out of the airway so that they stay out of the lungs. At its bottom end, the trachea divides into left and right air tubes called bronchi (pronounced: BRAHN-kye), which connect to the lungs.

Detailed explanation-5: -(B) The trachea and most proximal airways are lined by a pseudostratified epithelium formed by ciliated and secretory cells. Basal cells are located in this region and they can generate secretory and ciliated cell lineages.