Why Does the Brain Use So Much Energy?

What Crafty Clover says in this video

Intro

Hey there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does the brain use so much energy?

The Big Idea

Your brain is small, but it is one hungry organ! Even though it is small, it uses a big share of your body's energy, because being ready to fire is expensive. Let's find out just how hungry a brain can be.

Small in Weight

Step one: the brain is small. Your brain is only about 2 percent of your body's weight. That means a very small part of you does a huge amount of the thinking, sensing, and controlling.

Big Energy Use

Step two: it can use a lot of energy. Your brain can use about 20 percent of the energy your body burns, even when you are sitting still. That is ten times more than you would guess from its size.

Cells Stay Ready

Step three: brain cells stay ready to fire. Your brain cells, called neurons, keep waiting for the next message, like runners at a starting line. Thinking, sensing, and balancing all add up to a big fuel bill.

A Closer Look

Let's take a closer look at the brain's appetite. The brain is about 2 percent of your weight. But this energy pie shows the green slice, 20 percent, that goes to your brain. And food and sleep help refill your battery.

Quick Facts

Quick facts! Sleep and food help refill the tank. Thinking hard, sensing the world, and balancing all use energy. That is about one fifth of your energy, going to one small organ. And your brain keeps working even while you rest.

Think Like a Scientist

Now, think like a scientist! After a long test or a hard day of learning, stop and notice how you feel. Are you tired? Are you hungry? Your brain has been burning lots of fuel, so a snack and a good rest may be just what it needs.

Outro

Thanks for exploring with me! Remember, a well-fed, well-rested brain is a happy brain! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!