Brain and Behavior

Basic Concepts in Neuroscience

How costly is our brain?

Although our brain only weighs about three pounds (two to three percent of the average person’s body weight), it uses up about 15 percent of the blood that our heart pumps out and about 20 percent of our body’s oxygen and glucose. In other words it uses up to ten times as much of the body’s resources as would be expected for its weight.


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