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The gastrointestinal tract consists of the digestive organs including the pancreas, esophagus, stomach, gallbladder, liver, small intestine, and large intestine, all of which play vital roles in digestion and absorption of nutrients. The small intestine, made up of the duodenum, jejunum, and ileum, is responsible for digestion, absorption of nutrients, and water, and moves food along the tract. The duodenum is the first part of the small intestine where bile and pancreatic enzymes aid in breakdown and absorption of nutrients. The jejunum and ileum further absorb nutrients like carbohydrates, fats, proteins, and vitamins. Specialized absorption of certain nutrients occurs in the ileum before it connects to the colon. The large intestine, or colon, absorbs water and electrolytes while eliminating solid wastes. Motility in the gastrointestinal tract relies on peristalsis, a coordinated muscle contraction that assists in mixing and propelling contents downstream. The rectum and anus are responsible for retaining stool until defecation. Defecation involves a complex process of voluntary and involuntary muscle control to release stool at an appropriate time. Overall, the gastrointestinal tract's anatomy and physiology work together to ensure proper digestion and absorption of nutrients throughout the body.

Asset Subtitle

Jennifer Seminerio, MD

Meta Tag

Concept Gastrointestinal Tract

Concept Small Intestine

Concept Large Intestine

Concept Nutrient Absorption

Concept Duodenum

Keywords

gastrointestinal tract

digestive organs

small intestine

large intestine

absorption

nutrients

duodenum

bile

peristalsis

defecation

Gastrointestinal Tract

Small Intestine

Large Intestine

Nutrient Absorption

Duodenum