The Small Intestine - Anatomy and Physiology

Overview of the structure and function of the human small intestine. Topics covered are the duodenum, jejunum, ileum, villi and microvilli, gluten and celiac disease, hormones (secretin and CCK), gallbladder and bile, digestive enzymes of the pancreatic juice (trypsin, carboxypeptidase, lactase), goblet cells, and paneth cells.

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References

Gastrointestinal tract 3: the duodenum, liver and pancreas

Cholecystokinin and Gastrin receptors

Cholecystokinin Activates a Variety of Intracellular Signal Transduction Mechanisms in Rodent Pancreatic Acinar Cells

Duodenum Anatomy: Encyclopedia Britannica

Goblet cells: multifaceted players in immunity at mucosal surfaces

Paneth cells directly sense gut commensals and maintain homeostasis at the intestinal host-microbial interface

Digestive Enzymes

Structure and Function of Bovine Pancreatic Deoxyribonuclease I

Barrier function of the gut

Celiac Disease

Spectrum of gluten-related disorders: Consensus on new nomenclature and classification

Enteropeptidase: A Gene Associated with a Starvation Human Phenotype and a Novel Target for Obesity Treatment

Lower Digestive Segment

Difference Between Jejunum and Ileum

Small intestine microbiota regulate host digestive and absorptive adaptive responses to dietary lipids

The Structure and Function of the Human Small Intestinal Microbiota: Current Understanding and Future Directions