When we think we’re multitasking, we’re actually context-switching. That is, we’re quickly switching back-and-forth between different tasks, rather than doing them at the same time. The book Brain Rules explains how detrimental “multitasking” can be: Research shows your error rate goes up 50 percent and it takes you twice as long to do things.The cerebrum makes up 85% of the brain’s weight, and the brain makes up about 2% of a human’s body weight. The texture of the brain is like a firm jelly. The heaviest normal human brain weighed 4.43 pounds. It belonged to the Russian Writer Ivan Turgenev. And the smallest brain, just 2.41 pounds, belonged to a woman.This means that dehydration, even as small as 2%, can have a negative effect on brain functions. Dehydration and a loss of sodium and electrolytes can cause acute changes in memory and attention. To prevent any loss of body or brain function, take steps to keep your body properly hydrated.A two year old baby will have an 80% fully grown brain. It will continue to grow until you’re about 18 years old. It isn’t until about the age of 25 that the human brain reaches full maturity. The human brain is the largest brain of all vertebrates relative to body size. Leave 10 likes so I can make a part 2