Final answer:
Resident flora refers to the community of microorganisms found on the human body, particularly in the large intestine where it aids in metabolism and immune function.
Step-by-step explanation:
Resident flora, also known as microbiota, is primarily found in and on various parts of the human body, such as the skin, mouth, and most notably in the large intestine.
The term "flora" refers to the community of microorganisms present in a particular environment, despite originally being associated with plants. The resident flora, particularly in the human gut, plays crucial roles in metabolism of food molecules that our bodies cannot digest on their own, and in assisting with the immune system function.