Page 3 - TT 1 Keeping a Healthy Brain
P. 3
1. How heavy is the brain in tubs of butter?
8 1 4 5
2. What is the brain mostly made up of?
Fat Muscle Water
3. How much of our total energy does the brain use?
5%
11% 20% 5%
4. How neurons does the average human brain have?
500 thousand 80 million 100 billion 24 billion
