How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- What is the longest bone in the body?
“The femur, or thigh bone, is the longest and strongest bone in the body.”
Reference: Cleveland Clinic
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How many bones are in the human body?
Adults have 206 bones, while babies are born with around 300 that later fuse together.
How much energy does the brain use?
The brain makes up only about 2% of body weight but uses about 20% of the body's energy.