Human Body Facts | Facts about Human Bodies

How much of the human body is carbon?

About 18% of the human body's mass is carbon.

Oxygen is the most abundant element in the human body, making up about 65% of its mass, mostly in the form of water.

Laid end to end, the blood vessels in one human body would stretch about 60,000 miles.

Adults have 206 bones, while babies are born with around 300 that later fuse together.

Tooth enamel is the hardest substance in the human body.

Leonardo da Vinci's "Vitruvian Man" is a drawing that explores the ideal proportions of the human body.