Blood makes up about 7–8% of total body weight.

Queen lead singer Freddie Mercury was born with four extra teeth in his upper jaw giving him his distinct smile.

Fact #2584 · Human Body

Your small intestine is about 20 feet long — about four times your height.

Fact #3278 · Human Body

Your brain can store the equivalent of millions of gigabytes of information.

Fact #1908 · Human Body

The average person produces about 1–2 liters of saliva per day.

Fact #3288 · Human Body

The human body contains enough carbon to make thousands of pencils.

Fact #2625 · Human Body

A human brain generates enough electrical activity to be measured outside the skull.

Fact #2500 · Human Body

The human eye can detect a candle flame over a mile away in darkness.

Fact #2633 · Human Body

The human brain uses about 20% of the body's total energy despite being only 2% of body weight.

Fact #3271 · Human Body