Felicia has a respiratory infection and has been coughing up a lot of mucus.
She knows this means that her respiratory system is working to restore
balance by getting rid of the invasive materials from her lungs. How does this
happen?
A. The bronchi pull the mucus out of the lungs and into the bronchial
tubes where it is discharged.
B. The sinus cavities create the mucus as fluids are The sinus
cavities create the mucus as fluids are distributed by the kidneys
and flush it from the nostrils, distributed by the kidneys and flush
it from the nostrils.
C. Mechanisms within the bronchial tubes move the mucus, formed
around invasive materials, out of the lungs.
D. The cilia in the trachea squeeze the material out of the body as
mucus.
