Chemistry, 12.12.2020 16:10 brandonthomas11
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.
Answers: 1
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How does blood flow from a person's leg back to the person's heart?
A Gravity pushes the blood upwa...
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