How body uses food (digestive system)

As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules. The body then absorbs these smaller molecules through the walls of the small intestine into the bloodstream, which delivers them to the rest of the body.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.