The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
Only 1% of bacteria cause disease.
45
On average, someone in the US suffers a stroke every 40 seconds; someone dies every 3 minutes from stroke.
57
Enamel is hardest substance in the human body.
61
The average tastebud lives only 10 days before it dies and is replaced by a new one.
15
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
Banging your head against a wall uses 150 calories an hour.
57
A person will burn 7 percent more calories if they walk on hard dirt compared to pavement.
45