The slide below is a stained thin section of a human trachea…
The slide below is a stained thin section of a human trachea containing the mucociliary escalator. Which cell produces mucous? Image description: Stained tracheal tissue section. A points to small bright pink spheres at the top of the tissue. B points to large purple circular cells in the top layer of the tissue. C points to the small hair-like structures at the top of the tissue. D points to large pink cells deeper in the tissue.