In biology the small intestine is the part of the gastrointestinal tract between the stomach and the large intestine. In adult humans it is about 7m long. It is divided into three structural parts: duodenum, jejunum and ileum. Food from the stomach is allowed in to the duodenum by a muscle called the pylorus[?], or pyloric sphincter, and is then pushed through the small intestine by a process of muscular contractions called peristalsis. The small intestine absorbs nutrients from the food before passing the waste material into the large intestine.
... the town the population is spread out with 28.2% under the age of 18, 7.5% from 18 to 24, 33.5% from 25 to 44, 23.9% from 45 to 64, and 6.9% who are 65 years of age ...