This sample menu for a day gives you 37 grams of fiber: 1  Breakfast: whole-grain bran flake cereal (5 grams of fiber), half a banana (1.5 grams of fiber), and skim milk. 2  Snack: 24 almonds (3.3 grams of fiber) and a quarter cup of raisins (1.5 grams of fiber)
1 large circular folds called plicae circulares (shown in the diagram to the right), most numerous in the upper part of the small intestine. 2  smaller folds called villi, which are finger like mucosal projections, about 1mm long.o aid in digestion and absorption: 1  the small intestine secretes enzymes and has mucous producing glands. 2  The pancreas and liver also deliver their exocrine secretions into the duodenum. 3  The mucosa is highly folded.
Small Intestine: Site of Nutrient Absorption. The small intestine, which is approximately 10 feet long, is the site of most nutrient absorption. The inside surface of this organ contains numerous folds, covered by very thin, long projections on the inside of the intestinal wall called villi.