5. Adult brain weighs about3 poundsor 1300 to 1400 Grams. This is about 2% of the body weight if you weigh 150 pounds or 70 kgs. Sperm whale’sbrain weighs 7800 gms.
6. Although the brain only accounts for 2 percent of our body weight but it consumes20% of the oxygenthat we breathe androughly 20 percent of our daily calories.
7.15-20% of all blood pumpedout ofthe heart goes directly to the brain.
8. All the thinking in the brain is aboutelectricity and chemicals. The brain is more active and thinks more at night than during the day.