In addition, a 17 monitor uses another 80 watts. That comes to 150 watts in an hour, or .15 kWh. If you have the same computer on for only 4 minutes (say, to check your e-mail), that would come to .01 kWh.
A Dr. Mehmet Oz, MD , Cardiology (Cardiovascular Disease), answered. The heart gets its own supply of blood from the coronary arteries. The two main coronary arteries (right and left) and their branches supply blood throughout the heart muscle. This animation explains how these arteries transport blood.
So, you can say that main function of the heart is to supply all the body cells with oxygen and nutrients through the circulation of blood. Function of the Blood and Blood Vessels: If you have a bit of knowledge about the circulatory system, it would be clear to your that the function of the blood is to serve as a circulatory fluid.