Understanding Jejunal Anatomy and Its Functions

Jejunal refers to the middle part of the small intestine, which is a long tube-like structure in the abdominal cavity that plays a critical role in digestion and nutrient absorption. The jejunum is the second part of the small intestine, following the duodenum and preceding the ileum. It is responsible for the majority of nutrient absorption, particularly carbohydrates, proteins, and fats.

The walls of the jejunum are lined with finger-like projections called villi, which increase the surface area for nutrient absorption. The jejenum also contains specialized cells called enterocytes that absorb nutrients and produce hormones and other substances important for digestion and immune function.

Jejunal atrophy, or the wasting away of the walls of the jejunum, can occur due to a variety of conditions, such as celiac disease, Crohn's disease, and radiation therapy. This can lead to malabsorption and other gastrointestinal symptoms.