Question

Trachea, ciliated epithelium , Mucus , Diffusion

Answer 1

1.trachea allows the passage of air. it is a tube that connects the larynx and pharynx to the lungs.
2.ciliated epithelium have cilia which are hair like and this helps in the movement of mucus.
3.the movement of 1air from higher concentration to lower concentration. it helps in the exchange of gases in cells.

Answer 2

trachea is present in respiratory tract.
epithelium with cilia is ciliated epithelium
the movement of air molecules is diffusion