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

Question

Quizplus · Accepted Answer

Cilia are tiny hair-like structures found in the respiratory tract that sweep mucus and any foreign substances, such as bacteria or dust, out of the lungs. Phagocytic cells and macrophages are immune cells that engulf and destroy foreign substances or harmful cells. Enzymes are biological molecules that catalyze chemical reactions in the body and do not play a direct role in the movement of mucus out of the lungs.

Microscopic, Hair-Like Structures That Sweep Mucus and Foreign Substances Out