Question

Duodenum, jejunum and ileum are the parts associated to
a) Stomach
b) small intestine
c) Large intestine
d) Colon

Answer 1

Hint:The food from the stomach goes into the duodenum to get digested. The digestive juices from the pancreas are released into the duodenum for further digestion. The undigested part of the food reaches the ileum and is moved on to the next organ for further digestion.

Complete Answer:
The duodenum is the opening part of the small intestine. It is a connecting link between the stomach and the small intestine. The food from the stomach reaches the duodenum for further digestion. Duodenum is the smallest region of the small intestine. Jejunum is the middle part of the small intestine and mostly remains empty. Ileum is the end part of the intestine and is the largest part of the small intestine. Ileum is the connecting link between the large intestine and the small intestine. It has more muscular folds than the jejunum. Most of the digestion usually occurs in the small intestine and the chyme mostly gets digested here. The remaining undigested part is sent to the large intestine where the formation of the faeces take place. Small intestine is the longest intestine in size which is why it is present in many folds compactly packed together. The duodenum has less number of folds and ileum has the most number of folds. The small intestine receives its secretion from the pancreas and the liver which secretes the bile juice for food digestion.
Thus, the right option is B.

Note: The small intestine extends from the pylorus region of the stomach till the cecum of the large intestine. The small intestine has the presence of villi in its inner lining to increase the surface area for the absorption of food.