The relationship between humans and their digestive bacteria can be described as mutualism. In mutualistic relationships, both parties benefit from the interaction. In this case, the bacteria receive nutrients and a suitable environment to thrive, while humans benefit from the assistance with digestion and the production of certain vitamins and other beneficial compounds.
Humans and bacteria live in a close relationship with one another. For example, the bacteria that dwell in the human large intestine helps to complete the digestive process. The organism gains nutrients and protection in our intestine. The relationship between humans and their digestive bacteria can be described as:
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