atherosclerosis
No, only venous vessels have valves. Valves in veins help prevent the backflow of blood and aid in promoting blood flow back to the heart. Arterial vessels do not have valves because blood in arteries is under higher pressure and flows away from the heart.
veins
VEINS
The artery does
they bring oxygen to the brain
Capillaries.
cappilleries
arterial blood
Arterial is a reference to the blood in the arteries, as opposed to blood in the veins.
the pulmonary veins
It can mean Arterial Blood Gas.
An arterial bleed, because the blood is flowing at a high rate of speed/pressure.