Question

Part of alimentary canal meant for reabsorption of water from chyle is
A. Small intestine
B. Colon
C. Large intestine
D. Rectum

Answer 1

Hint: Chyle is a milky bodily fluid consisting of lymph and emulsified fats, or free fatty acids. It is formed in the small intestine during digestion of fatty foods, and taken up by lymph vessels specifically known as lacteals.

Complete Answer:
- The human digestive system consists of the gastrointestinal tract and the accessory organs such as tongue, salivary glands, pancreas, liver, and gallbladder. Digestion is the breakdown of food into smaller particles, until they can be absorbed and assimilated in the body.

- The mechanical breakdown of food occurs by chewing, and the chemical breakdown by digestive enzymes takes place in the mouth. In the stomach, the food is further broken down by mixing with gastric acid after which it passes into the duodenum. In the intestinal phase of digestion, it is mixed with a number of enzymes produced by the pancreas. Most absorption of water and nutrients occur in the intestines. Chyle are milky droplets formed in small intestines. Its reabsorption takes place in the large intestine.

- Large intestine is the posterior section of the intestine which consists of four regions: the cecum, colon, rectum, and anus. In the upper-half of the large intestine, enzymes from the small intestine complete the digestive process, and bacteria produce B vitamins (B12, thiamine and riboflavin) as well as vitamin K.

- The major function of the large intestine is the absorption of water and electrolytes from digestive residues and storage of fecal matter until it can be expelled. Churning movements of the large intestine gradually expose digestive residue to the absorbing walls. A progressive and more vigorous type of movement known as the gastrocolic reflex, occurs only two or three times daily, propelling the material toward the anus.

Hence, the correct option is C, “Large intestine”.

Note: The term colon is sometimes used to refer to the entire large intestine. Common problems of the large intestine include inflammation, such as colitis, diverticulosis, and abnormal growths, such as benign or malignant tumors.