🎓 GED Exam Prep

What is the primary function of the human circulatory system?

A To break down food into nutrients
B To exchange gases like oxygen and carbon dioxide
C To transport blood, oxygen, nutrients, and waste throughout the body
D To produce hormones that regulate body functions

✓ Correct Answer: Option C

The circulatory system, including the heart, blood vessels, and blood, is responsible for circulating essential substances like oxygen and nutrients to cells and carrying away waste products.

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