Function of jejenum?

The jejunum is the middle section of the small intestine and plays a crucial role in the digestion and absorption of nutrients from food. It is responsible for further breaking down food particles and absorbing nutrients such as carbohydrates, proteins, fats, vitamins, and minerals into the bloodstream. The jejunum also helps in the absorption of water and electrolytes.

The jejunum is the second part of the small intestine, located between the duodenum and the ileum. It is responsible for the majority of the absorption of nutrients from food.

The jejunum has a number of functions, including:
- Absorption of nutrients: The jejunum is lined with villi, which are small finger-like projections that increase the surface area for absorption of nutrients. The villi are covered in microvilli, which further increase the surface area for absorption.
- Digestion of carbohydrates: The jejunum secretes enzymes that break down carbohydrates into simple sugars, which can then be absorbed into the blood.
- Digestion of proteins: The jejunum also secretes enzymes that break down proteins into amino acids, which can then be absorbed into the blood.
- Digestion of fats: The jejunum secretes bile salts, which help to break down fats into fatty acids and glycerol, which can then be absorbed into the blood.
- Production of hormones: The jejunum produces a number of hormones, including cholecystokinin (CCK), which stimulates the gall bladder to contract and release bile into the duodenum.
- Immune function: The jejunum contains a number of immune cells that help to protect the body from infection.


The jejunum is an important organ in the digestive system, and its functions are essential for the body to obtain the nutrients it needs from food.