It continues to grow until you’re about 18 years old.Ħ) Headaches are caused by a chemical reaction in your brain combined with the muscles and nerves of your neck and head.ħ) The brain of a human contains approximately one hundred billion neuronsĨ) It is a myth that humans only use 10 percent of our brain. It weighs about 20 pounds.ĥ) The human brain will grow three times its size in the first year of life.
This means that dehydration, even in small amounts, can have a negative effect on the brain functions.Ĥ) The largest brain of any animal is that of the sperm whale.
1) Signs of successful brain surgeries go as far back as the Stone Age.ģ) About 75 percent of the brain is made up of water.
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