. What is the primary role of the respiratory system?
A. To convert glucose into energy.
B. To move blood around your body.
C. To help you breathe in oxygen and expel carbon dioxide.
D. To break down food into nutrients.
Select your answer:
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Animal Nutrition › ViewWhich of the following processes builds up polymers?
A. Catabolic reaction
B. Anabolic reaction
C. Both
D. Neither
Circulatory and Lymphatic System › View
What is the difference between the pulmonary vein and all the other veins of an adult?
A. It carries oxygen-poor blood, while the other veins carry oxygen-rich blood
B. It carries oxygen-rich blood, while the other veins carry oxygen-poor blood
C. It carries blood to the heart, while the other veins carry blood away from the hear
D. It carries blood away from the heart, while the other veins carry blood to the heart