BI-1119
Arteries, veins and capillaries
Biology · Secondary 3 · Medium · Arteries, veins and capillaries
Which statement correctly describes the main function of capillaries in the circulatory system?
- They allow exchange of substances between blood and tissue cells.
- They pump blood out of the heart at high pressure.
- They prevent backflow of blood into the heart.
- They store extra blood as a reservoir.
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