The aorta, the body's largest artery, is about 3 cm wide at its widest point.

The human body contains enough carbon to make about 9,000 pencils.

Fact #3625 · Human Body

The human brain contains about 86 billion neurons.

Fact #1676 · Human Body

Your brain builds awareness.

Fact #2395 · Human Body

The acid in your stomach is strong enough to dissolve razor blades.

Fact #3501 · Human Body

The human brain contains roughly 86 billion neurons.

Fact #8 · Human Body

The femur (thigh bone) is stronger than concrete.

Fact #3286 · Human Body

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

Fact #3278 · Human Body

The liver can regenerate itself — as little as 25% of the liver can regrow into a full organ.

Fact #3276 · Human Body