Veins have valves, arteries don't.
the type of blood vessels which flow contaminated blood to the heart are known as VEINS
The smooth muscle type is associated with blood vessels. This muscle type is involuntary.
Canary blod vessels
The smallest blood vessels of the body = capillaries
A hemangioma is actually a type of tumor that lines the blood vessels. It is basically an increased number of vessels that are filled with blood.
vein
Veins.
vein
The stomach and blood vessels are composed of smooth muscles.
Veins
signals from the heart regulate the flow of blood . there are some values which regulate the backward flow of blood
veins