Bacteria+humans=symbiotic?

Hey everyone, I know that there are plenty of bacteria in the human body and some are even essential to our survival. Humans have a symbiotic relationship with some of them. But my question is can anyone please give me the details (or a good link if you know of one) as to where are these bacteria and what function do they serve? What exactly is it that they do that helps us stay alive and what do WE do for them? Which part of the body are they in?

Bacteria+humans=symbiotic?
The majority of the bacteria located in the human body are located in two areas : the epidermis and the digestive system.





While the bacteria on the epidermal layer are primarily problematic (pimples, etc..) the bacteria located in the colon actually produce helpful enymes to aid in the digestive process.





There are bacteria in the mouth that facilitate the break down of food, however, we must brush our teeth regularly or they'll begin breaking down our tooth enamel as well.





Best of luck with your question!
Reply:try some searches on web MD
Reply:.








.. we have a symbiotic relationship with bacteria at the base of our eyelashes. They help keep the roots clean and they hold them in place. Without them our eyelashes would all fall out.








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Reply:theyre predominately on external surfaces of your body (like your skin, mouth, vagina, etc) and your gastrointestinal tract. they keep harmful bacteria away by competeing for nutrients so they cant run wild, and they also do countless other tasks like synthesize vitamins and help with digestion.