Did you know??
-Bone cells are replaced every 3 months, they make up 1/5 of the body's weight.
-The adult brain has 86 BILLION nerve cells & it uses 25% of the body's oxygen.
-Every year 98% of the body is replaced.
-Blood makes up about 8 percent of your total body weight.
-The human nose can detect about 1 trillion smells.
-You have two kidneys, but only one is necessary to live.