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.
This article contains a list of organs of the human body. There are approximately 79 organs, though there is no standard definition of what constitutes an organ and some tissue groups' status as one is debated. 1 Musculoskeletal system.