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The circulatory system transports many important substances such as oxygen and nutrients. Which of the following helps keep the blood flowing normally? a. hemoglobin in the blood b. muscular walls of the
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The circulatory system transports many important substances such as oxygen and nutrients. Which of the following

helps keep the blood flowing normally?
a. hemoglobin in the blood
b. muscular walls of the arteries
c. nutrients in the blood plasma
d.oxygen content of the blood

User Robert Langdon
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1 Answer

3 votes

Answer:

the answer is b. muscular walls of the arteries

Step-by-step explanation:

User Franco Torres
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