the type of blood vessels which flow contaminated blood to the heart are known as VEINS
by blood vessels
Veins.
vein
vein
The heart is a pump and move blood through the blood vessels.
veins
veins
artery- vein- capillary
Arteries carry blood away from the heart. Veins carry blood to the heart.
the blood vessels
signals from the heart regulate the flow of blood . there are some values which regulate the backward flow of blood
Blood flows through veins to get to the heart. Arteries are blood vessels for the blood to leave the heart once it has been oxygenated.