In your one human lifetime: Your eyes will blink 450 million times, you will breathe 650 million times, you will grow 1,000 layers of skin, your nails will grow 7 feet, you will lose 70 miles of hair from your head… And your heart will beat 2,500,000,000 times!
If you rub your forearm briskly for a few seconds, 300,000 skin cells will come off of it. By age 70, you will shed 105 pounds of skin.
Your bones are 50% water.
IN ONE DAY: a person doing light work sweats three quarts of water… and a baby cries an average of 133 minutes.