★ Circulatory and Respiratory System Quiz
Your alveoli and capillaries work together to __________________.
A. produce mucus
B. transport oxygen into your lungs and carbon dioxide into yoru blood.
C. transport carbon dioxide into your lungs and oxygen into your blood.
D. help you breathe
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When you eat nad drink, this closes over the entrance of your trachea so no food or drink gets into your lungs:
A. bronchi
B. epiglottis
C. larynx
D. alveoli
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