Question

The part of digestive system where no digestion occurs:
A. Duodenum
B. Esophagus
C. Stomach
D. Mouth

Answer 1

Hint: Digestion refers to the process where the food and liquid consumed by us are processed and broken down into the smallest parts that can be absorbed by the various parts of the human body.

Complete Answer:
The human digestive system comprises of Mouth, Esophagus, Stomach, Small intestine, Large intestine (incorporates the colon and rectum) and Anus.
1. The initial phase in the digestive system happens in the mouth. This is the place food is bitten and separated into a size that can be easily gulped.

2. The esophagus interfaces the throat above with the stomach beneath. It is the initial organ into which the food goes.

3. Where the throat and stomach join, there is a ring-like valve that shuts the entry between the 2 organs. At the point when food nears the shut ring, the encompassing muscles unwind and permit the food to pass into the stomach. It at that point closes once more.

4. The food at that point enters the stomach. The stomach finishes 3 mechanical undertakings. It stores, blends, and discharges.

5. The food is processed in the small intestine. It is broken down by the juices from the pancreas, liver, and digestive system. The substance of the digestive system is blended and pushed forward to permit further processing.

6. Last, the digestive nutrients are assimilated through the intestinal dividers. The side-effects, including undigested pieces of the food (fiber) and more established cells that have been shed from the coating of the digestive system (mucosa), move into the colon. Waste products in the colon regularly stay for a day or two until the excrement is removed by a solid discharge through anus.
Of all the parts of parts of the digestive system, the associating joint from the mouth to the stomach is the throat. It is a muscular tube that moves the incompletely processed food from mouth to stomach for additional absorption.
Hence, Esophagus is one part of the digestive system where no digestion happens.

Therefore, the correct answer for this question is B, i.e. Esophagus.

Note: The mass of the throat from the lumen outwards comprises mucosa, submucosa (connective tissue), layers of muscle strands between layers of stringy tissue, and an external layer of connective tissue. Hence, unable to digest anything.