THIS HUMAN BEING HAS BACTERIA LIVING IN HIS DIJESTIVE SYSTEM. ANY HUMAN BEING IN THIS WORLD HAS THIS BACTERIA IN THEIR BODY.THIS TYPE OF SYMBIOSIS IS CALLED MUTUALISM, WHEN BOTH SPECIES GET BENIFIT. ALL HUMAN BEINGS GO THROUGH MUTUALISM BEACUASE OF HAVING THIS BACTERIA. THE BACTERIA GETS BENIFIT BECAUSE IT GETS THE FOOD WE EAT AND A PLACE TO LIVE; OUR STOMACHS. WE ALSO GET BENIFIT FROM THE BACTERIA BECAUSE IT HELPS US DIJEST OUR FOOD TO HELP US USE THE BATHROOM.