Materials. 1  DriMark Counterfeit Detector Pen with adhesive holder! (It was cheaper than purchasing 3 to a package.) Patent number 5,063,163 is proudly printed on the bottom of the package. 2  Dollar bills. I used four singles instead of twenties, fifties or hundreds for two reasons. 3  Starch.
All living beings are made up of cells. Some of them are made up of only one cell and others have many cells. The average adult human body has around 37.2 trillion cells. WOW, that's a lot of cells. So many, in fact, that it's hard to picture.
There are several ways to consider the composition of the human body, including the elements, type of molecule, or type of cells. Most of the human body is made up of water, H 2 O, with cells consisting of 65-90% water by weight. Therefore, it isn't surprising that most of a human body's mass is oxygen.