The counterfeit detector pen is extremely simple. It contains an iodine solution that reacts with the starch in wood-based paper to create a black stain. When the solution is applied to the fiber-based paper used in real bills, no discoloration occurs.
The human body, consisting of about 100 trillion cells, carries about ten times as many micro-organisms in the intestines. The metabolic activities performed by these bacteria resemble those of an organ, leading some to liken gut bacteria to a âforgottenâ organ.
There are two types of cells within the human body. There are red blood cells, which carry oxygen throughout the body. The other cells are called white blood cells, which â¦ fight infection.