ANATOMY

Detailed explanation-1: -Chemical digestion in the small intestine relies on the activities of three accessory digestive organs: the liver, pancreas, and gallbladder. The digestive role of the liver is to produce bile and export it to the duodenum. The gallbladder primarily stores, concentrates, and releases bile.

Detailed explanation-2: -To help break food down, the small intestine receives digestive juices from other organs in your digestive system, including your liver, gallbladder and pancreas. Ducts from these organs feed into the duodenum.

Detailed explanation-3: -The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion. The walls of the small intestine absorb water and the digested nutrients into your bloodstream.

Detailed explanation-4: -The absorptive surface area of the small intestine is increased by plicae circulares, villi, and microvilli. Exocrine cells in the mucosa of the small intestine secrete mucus, peptidase, sucrase, maltase, lactase, lipase, and enterokinase.

Detailed explanation-5: -The middle part of your small intestine is the jejunum. The jejunum absorbs most of your nutrients: carbohydrates, fats, minerals, proteins, and vitamins.