1. Valves in the veins which stop blood flowing backwards
2. As the muscles around the veins contract (from general activity eg walking) they squeeze the veins, therefore forcing blood back to the heart (in just that direction because of valves)
Valves in the vein making sure the blood goes in one direction.
Also breathing helps draw the blood back up.
Similarly, the calf muscles help push the blood back up to the heart.
VEINS. veins contain smooth muscles inside them which propels blood until it reaches the heart. --thoughtfulobserver
right vessicel
valvesCancel
Blood flows away from the heart in arteries, and towards the heart in veins.
arteries carry oxygenated blood away from the heart whereas veins carry deoxygenated blood to the heart
veins are unique because they connect to the capillaries and return oxygen- rich blood to the right atria of the heart so that blood can exchange carbon dioxide for fresh oxygen in the lungs
Veins carry deoxygenated blood back the heart.
Arteries carry blood that has been oxygenated from to the heart to other parts of the body. Veins carry blood that needs to go to the heart to be purified. Arteries are thick, veins are thin.
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veins, maybe
Veins are blood vessels that carry blood toward the heart.
The heart pumps it. When your heart beats it squeezes blood in the heart into the arteries and from the arteries to the veins and from the veins back into the heart.
blood vessels that carry blood toward the heart are called veins.
Veins are thin. They carry blood to the heart and brain.
Veins