ASGE Recognized Industry Associate (ARIA) Training Program OPEN | April 2022-Session 3

Video Transcription

Video Summary

In this video, the speaker discusses the small and large intestines, their functions, and their anatomy. The small intestine is the main location for nutrient digestion and absorption, and it is approximately six feet long. It is divided into three parts: the duodenum, jejunum, and ileum. The duodenum is where the stomach empties into the small intestine, and it is the shortest part of the small intestine, about 12 inches long. The jejunum is the mid-portion of the small intestine and is responsible for breaking down macromolecules into micromolecules for absorption. The ileum is the last part of the small intestine, connected to the colon at the ileocecal valve. In the ileum, bile acids and vitamin B12 are absorbed. The large intestine, or colon, is about 4 to 5 feet long and primarily functions in absorbing water and electrolytes. Peristalsis helps move stool along the colon, and defecation occurs when the internal anal sphincter and external anal sphincter relax.

Asset Subtitle

Gauree Konijeti, MD, MPH

Keywords

small intestine

large intestine

functions

anatomy

nutrient digestion