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
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
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
You inhale about 700,000 of your own skin flakes each day.
29
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193

