Ever got bitten by a leech? Yes or no? Well, if you are unlucky then surely this creature has made a mark on you. But how does it do it’s work? Well, when a leech get in a connection to a human body or any other animal, at first they release some kind of chemical in the flesh which make the bitten place numb. Then with it’s many teeth, a leech places it’s mouth to suck blood. That's how it works. Ever knew this?