In which part of the circulatory system does the exchange of oxygen and carbon dioxide take place between blood and cells?
a. veins
b. arteries
c. capillaries

The part of the circulatory system that does the exchange of oxygen and carbon dioxide take place between blood and cells are the capillaries. These are small vessels that connect the arteries and veins forming a network of capillary bed in different tissues. They are so small that red blood cells move into a single file.

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