6 percent of human body weight comes from blood. And this blood flows through the veins and sub-veins in our body all the time. An adult human body has an average of 4.5 to 5.5 liters of blood. However, it can vary depending on gender , weight , height and Sarki's health status. However, these blood vessels travel through the veins in our body all the time through the heart. And this heart beats every minute, every time the heart beats, the blood circulates in the body and through this our body gets heated.