MRCP UK EXAMINATIONS

Detailed explanation-1: -The small intestine is responsible for absorption of nutrients, salt, and water. On average, approximately nine liters of fluid enters the jejunum each day. The small intestine absorbs approximately seven liters, leaving only 1.5-2 liters to enter the large intestine.

Detailed explanation-2: -Jejunum. The jejunum is the middle part of the small intestine, between the duodenum and ileum. Most digestion and nutrient absorption takes place in the jejunum.

Detailed explanation-3: -After the food is digested, it is broken down into nutrients such as carbohydrates, fats, proteins, vitamins and minerals. All these nutrients are absorbed in the small intestine, into the blood, from where it is taken to other parts of the body.

Detailed explanation-4: -In the small intestine, absorption occurs through the lumenal face of the mucosa, which is covered with finger-like projections called villi. Each villus is bordered by several pouches or invaginations called crypts. On the average, each villus is surrounded by eight crypts.