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It's forced upwards by the pressure of the blood behind it. Additionally, there are valves in veins and arteries to stop the blood flowing backwards (kind of like a door that only opens one way).

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Q: How does blood move from lower parts of your body to heart against th force of gravity?
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What makes blood return to your heart from your feet against the force of gravity?

The pumping force of the heart.


What kind of circuation moves blood to the heart tissues?

Venous circulation. The arterial system moves oxygenated away from the heart to the rest of the body (as well as deoxygenated blood away from the heart to the lung). Blood moves mostly passively through the venous system, but muscular contractions in the legs help force blood upward (against gravity) to the heart when standing.


What two factors work together to push blood against gravity back up to the heart?

blood pressure and valves


Valves are found in?

The Heart- Between the Atria and Ventricles Veins- So they help push blood back to the heart against gravity.


Which force must the flow of blood overcome as it moves from the feet back up to the heart through the veins?

Gravity


Explain the factors that enable blood in your leg veins to return to the heart in spite of the downward pull of gravity?

In the circulatory system, veins, the vessels responsible for returning blood to the heart have valves that open to let blood flow through and shut to hold it against the downward pull of gravity.


What is the effect of gravity on blood pressure?

It is important to note that the flow of blood in the body is directly influenced by gravity. When a person is standing, gravity helps pull the blood downward to the lower extremities. Without gravity, blood tends to remain closer to the heart. The force of gravity also makes it more difficult for the blood to flow upward to return to the heart and lungs for more oxygen. Our bodies have evolved to deal with the ever-present downward force of gravity; our leg muscles function as secondary pumps to help in the process of venous return which is blood flow back to the heart, also referred to as cardiac input). During walking or other leg movements, the muscles contract, forcing blood up through the veins of the calf toward the heart. The valves in the veins are arranged so that blood flows only in one direction (Figure 10). This mechanism effectively counteracts the force of gravity.


How does gravity affect your blood?

Gravity slows down the return of blood to the heart.


Is blood pressure the regular beat of blood flow?

Blood pressure is the force of your blood going through you body. Your systole number is the force of the blood coming from the heart, and the average number is 120. Your diastole is the force of the blood returning to the heart, and the average number is 80. Your systole number is higher than your diastole number because the heart has to beat greater in order to get the blood to the upper half of your body, which means it has to defy gravity. :)


Why is blood pressure low when in reclining position?

Your blood pressure is higher when your heart is hard at work, pumping blood while your body is moving, keeping balance, etc. (when you're awake and standing.) And when you are reclining, your heart is at rest and doesn't need to work as hard to pump blood through out the body.


The movement of blood from legs toward the heart is slowed dowm by gravity the effect of gravity is counteracted by?

The valves in veins assist blood is the movement of blood from the legs. This is slowed by gravity.


Relating to the force of blood going through the heart?

relating to the force if the blood going through the heart?