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Questions and Answers
What is the function of the heart in the cardiovascular system?
What is the function of the heart in the cardiovascular system?
- To transport blood through the body (correct)
- To branch into narrower capillaries
- To adjust the volume of blood flowing to different parts of the body
- To diffuse fluids and solutes out of the capillaries
What is the function of venules in the cardiovascular system?
What is the function of venules in the cardiovascular system?
- To branch into even narrower capillaries
- To transport blood at high pressure into arteries
- To return blood to the heart from small veins (correct)
- To adjust the volume of blood flowing to different parts of the body
Why does blood flow slowly in capillaries?
Why does blood flow slowly in capillaries?
- Because there is less time for substances to diffuse into and out of the extracellular fluid
- Because there is more pressure in capillaries
- Because there is more time for substances to diffuse into and out of the extracellular fluid (correct)
- Because there is less pressure in capillaries
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