What will you answer if asked what is dirtiest part in your body? You answer might be anus.
Most people consider anus as dirtiest part in body due to it contact with faecal matter. But it is discovered by scientist at Harvard school of dental medicine that there are more than 615 different kinds of bacteria messing up your mouth, tongue and other part making them dirty of dirtiest.
So let have a look on these part to know more.