The jejunum is a part of the small intestine, located between the duodenum and the ileum. It is approximately 2.5 meters long and plays a crucial role in the digestion and absorption of nutrients from food. The inner lining of the jejunum has many folds and tiny projections called villi, which increase the surface area for nutrient absorption. This section of the small intestine is primarily responsible for absorbing carbohydrates, proteins, and fats. The jejunum receives partially digested food from the stomach and continues the digestive process, ensuring that essential nutrients are delivered to the body for energy and growth.