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How do veins return blood to the heart? A. using simple and facilitated diffusion B. using osmosis and simple diffusion C. using capillaries and arteries D. using valves and muscle contractions
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18 votes
How do veins

return blood to the
heart?
A. using simple and
facilitated diffusion
B. using osmosis and
simple diffusion
C. using capillaries and
arteries
D. using valves and muscle
contractions

User Dkhaupt
by
3.7k points

1 Answer

4 votes

Answer:

using capillaries and

arteries

Step-by-step explanation:

User Ahmed Hussein
by
3.5k points
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