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How does blood flow from a person's leg back to the person's heart? A Gravity pushes the blood upward. B Lungs pull the blood upward. C Contracting leg muscles push the blood upward. D Contracting heart
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How does blood flow from a person's leg back to the person's heart?

A Gravity pushes the blood upward.
B Lungs pull the blood upward.
C Contracting leg muscles push the blood upward.
D Contracting heart muscles pull the blood upward.

User Maxim Krizhanovsky
by
7.0k points

1 Answer

3 votes

Answer:

A

Step-by-step explanation:

A. Gravity pushes the blood upwards

when you walk, stand or move at all, the muscles squeeze the veins and the blood flows.

OFF G00GLE JUST REWORDED A LITTLE.

User Tauran
by
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