An organ is defined as âa group of tissues that perform a specific function or group of functionsâ. Since an artificial heart is not made up of tissues, itâs not an organ. Maybe we need to change the definition of âorganâ, but for right now, this is how it stands. Related Questions.
The symbol on the back of the U.S. dollar bill is the Great Seal of the United States. The face (obverse) of the Great Seal first appeared on the back of the $20 Gold Certificate, Series 1905. In 1935, both the face and back (reverse) of the seal appeared for the first time on paper money on $1 Silver Certificates.
Just like the mysterious disappearance of the lost colony of Roanoke, the hidden meanings behind the symbols on the one-dollar bill remain some of Americaâs greatest puzzles. What do these symbols actually mean? Why does the pyramid have a glowing eye at the top of it? And what is the creature that seems to be hidden next to the number â1â on the front of the bill? To find out, pull out a one-dollar bill â then scroll through this incredible list to see just what has been hiding right in your wallet all of these years.