the carotid arteries
as insufficient oxygenated blood supply to brain
They supply the brain (and structures of the head, as well) with oxygenated blood.
the artery(oxygenated blood) and vein(de-oxygenated blood)
Almost none. It does control its own flow, and it will speed the heart in anticipation of need, but that does not effect the actual flow of blood.
The lingual artery is the branch of the external carotid artery that supplies the tongue with oxygenated blood.
It pumps the oxygenated blood and sends it to your muscles and brain.
The blood vessels around the brain help supply energy for your brain
The liver and kidneys are examples of organs that have dual blood supply. They receive blood from both the hepatic portal system and the hepatic artery (liver) and from the renal artery and renal vein (kidneys). This dual blood supply is important for their functions in filtering and processing blood.
It pumps blood to and from your lungs to become oxygenated, and then pumps that oxygenated blood to your brain and the rest of your body for your cells to receive oxygen. Apparently it isn't pumping as much blood to your brain as it does most people, though.
When the blood supply to a portion of the brain is blocked this causes a stroke.
When the blood supply to a portion of the brain is blocked this causes a stroke.
It supply blood to organs External to the skull.