They are some organs in our body without which we can live our life but without some we will die instantly. Such organs are heart, brain, nervous system, kidney etc. Blood is another very important fluid of our body and it’s the blood which keeps our organs alive by providing sufficient amount of energy and oxygen to the organs.
Brain blood vessels are among the most important blood carrying vessels in our body because it supplies blood,

 

 

oxygen and energy to our brain. To perform normal function of brain, the brain requires sufficient amount of oxygen, nutrients, through a network of blood vessels. The blood is supplied to our brain, scalp and face via two major sets of vessels. One set is known as the right and left common carotid arteries and the other set is known as right and left vertebral arteries.
The common carotid arteries are separated in two; one is external and the other in internal. The external carotid arteries supply blood to the face and scalp whereas the internal carotid arteries supply blood to anterior (three-fifth of cerebrum).

 

 

The internal carotid arteries do not supply blood to the occipital lobes and temporal lobes. The vertebrobasillar arteries supply blood to the brain stem, part of cerebellum and to the posterior two-fifths of the cerebrum.
When any sort of decrease is experienced in the flow of blood through any internal carotid arteries, some injury and impairment in the function can be observed of the frontal lobes. This injury of impairment can lead to weakness, numbness, paralysis etc.