The body site with resident flora that produces beneficial body products, including vitamin K and several other vitamins is the

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The large intestine contains resident flora that help produce several vitamins, including vitamin K, which is essential for blood clotting. The skin and nasal passages do have resident flora, but they do not produce beneficial body products like vitamin K. The mouth and vagina also have resident flora, but they do not produce as many beneficial body products as the flora in the large intestine.

The Body Site with Resident Flora That Produces Beneficial Body