HUMAN NUTRITION

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: -Intestinal Absorption of Vitamin K Phylloquinone is absorbed in the jejunum and ileum and is dependent on adequate flow of bile and pancreatic secretions being enhanced by coadministration of dietary fat (140).

Detailed explanation-3: -The small intestine is responsible for absorption of nutrients, salt, and water.

Detailed explanation-4: -Water is absorbed by the large intestine by osmosis, with diffusion occurring in accordance with the osmotic gradient. Sodium is absorbed by the sodium/potassium pump in the colon, which diffuses potassium and sodium in opposite directions due to the formation of concentration gradients.

Detailed explanation-5: -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.