Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Did you know?
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Did you know?
Everyone has one nostril that is larger than the other.
The central nervous system
Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent