1) We have between 2-4 million sweat glands to keep our body temperatures regulated;
2) Our body is made up of 1.6 trillion skin cells, and we lose and replace between 30,000-40,000 a hour;
3) The human thighbone is stronger than concrete, and capable of supporting 30 times its own volume and weight;
4) There’s enough pressure in your heart to squirt blood 30 feet;
5) The human lungs contain approximately 1,500 miles of airways, and 300-500 million hollow cavities.
(Published December 12, 2014)
