THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The process of breaking down of food into simpler form is called digestion.

Detailed explanation-2: -The small intestine is the most important organ of the digestive system as it serves both, for digestion and absorption. It receives two digestive juices; the bile and the pancreatic juice in the duodenum. These two juices virtually complete the digestion of starch, proteins, carbohydrates, etc.

Detailed explanation-3: -Digestion is necessary for breaking down food particles into nutrients that are used by the body as an energy source, cell repair and growth. Food and drink need to be converted into smaller molecules of nutrients before it is absorbed by the blood and carried to the cells throughout the body.