★ Circulatory and Respiratory System Quiz
Mucus ___________________.
A. is the waste product of bacteria.
B. is filled with plasma and platelets.
C. traps germs so they don’t get into your lungs.
D. lubricates your nostrils so air can get into your lungs.
Preview next quiz:
The muscle under your lungs that helps you breathe is your __________________.
A. larynx
B. trachea
C. bronchi
D. diaphram
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