Microscopic, hairlike structures that sweep mucus and foreign substances out of the lungs are called
A) phagocytic cells.
B) macrophages.
C) enzymes.
D) cilia.

Question

Quizplus · Accepted Answer

Cilia are microscopic, hairlike structures that line the respiratory tract and help to sweep mucus and foreign substances out of the lungs. Phagocytic cells and macrophages are involved in the immune response and do not have a direct role in moving mucus out of the lungs. Enzymes can play a role in breaking down mucus, but they do not physically move it out of the lungs.

Microscopic, Hairlike Structures That Sweep Mucus and Foreign Substances Out