Which of the following does the cilia in the nasal cavity, trachea, and bronchi not do to expelled foreign matter from the body?
A. swallowed
B. sneezing
C. breathing
D. coughing

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Did you know that a blue wales tongue weighs more than an elephant?

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.