Question

how does blood move back to the heart? the muscles of the heart pump the blood back toward itself. the muscles in veins and other parts of the body help move blood back to the heart. blood naturally flows back toward the heart, thanks to gravity. the muscles in arteries and other parts of the body help move blood back to the heart.

Explanation:

Veins carry blood back to the heart. The muscles in veins (vascular smooth - muscles) and skeletal muscles in other parts of the body help "squeeze" blood back to the heart through a process called the skeletal - muscle pump. The heart's muscles pump blood out, not back to itself. Blood flow back to the heart is not mainly due to gravity, and arteries carry blood away from the heart.

Answer:

The muscles in veins and other parts of the body help move blood back to the heart.