Where do certain symbiotic microorganisms normally occur in human body

Caecum (part of large intestine) contains symbiotic organisms in human body .These are the organisms are notat all harmful for the body rather they are healthy bacteria which are very much necessary in human body .They help in digestion in human body

Found in upper part of large intestine helps in synthesis of vit-B12 and also some other.by feeding on faeceal matter of our body.

That`s caecum where bacteria found which help in formation of vit.b12 and also castel extrensic factor.

Caecum (part of large intestine) contains symbiotic organisms in human body .These are the organisms are notatum large intestine helps in synthesis of vit-B12 and also some other.by feeding on faeceal matter.

In ncert it is given in ceacum but if you go through higher human physiology books u find there that they are present in rectum .