THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The colon houses trillions of bacteria that protect our gut and produce vitamins. The bacteria in the colon produce substantial amounts of vitamins by fermentation. Vitamin K and B vitamins, including biotin, are produced by the colonic bacteria. These vitamins are then absorbed into the blood.

Detailed explanation-2: -The organ that is responsible for the vast majority of nutrient absorption is the small intestine. The small intestine contains a brush border made up of villi and microvilli, which dramatically increases the amount of absorptive surface area for nutrient absorption.

Detailed explanation-3: -Duodenum: Absorbs Vitamin A, D, E, and K. Jejunum: Absorbs protein, carbohydrates, vitamins and minerals. Ileum: Passes food to the colon and absorbs Vitamin B12.

Detailed explanation-4: -We found that Enterococcaceae, which is a type of lactic acid bacteria that produces vit K, was abundant in the vit K-deficient group.