What Makes Eating So Enjoyable?
Twenty-one-year-old Rachel usually eats a breakfast of cereal and milk right before her morning nutrition class.
What Is Digestion and Why Is It Important?
The simple definition of digestion is the breaking down of foods into absorbable components in the gastrointestinal (GI) tract. Through a multistep digestive process, bood is softened with moisture and heat, and then broken down into smaller particles by chewing and exposure to enzymes.
What are the organs of the GI Tract and why are they important?
The organs of the GI tract each play a unique and crucial role in digestion. Before we examine the individual roles of the organs, take a look to any figure of the human body and refresh your memory of how organs are built from cells and tissues and how they work together in various body systems. Understanding how cells build tissues will help you understand how digestion and absorption happen in the body.
Most Digestion and Absorption Occur in the Small Intestine
The small intestine is a long, narrow, coiled chamber in the abdominal cavity. The “small “in “small intestine “refers to its diameter, not its length, which accounts for about 20 of the 23 feet of the GI tract. It consists of three segments-duodenum, jejunum, and ileum-and extends from the pyloric sphincter to the beginning of the large intestine.
Enzymes, Hormones, and Bile Aid Digestion
The complete digestion of chyme requires chemical secretions, including enzymes, hormones, and bile. Supportive digestive organs such as the pancreas, liver, and gall-bladder contribute or concentrate many of these fluids.