Question

Sam built a working model of an organ system using a thin long pipe which is connected to a plastic bag. The bag is in turn connected to one of the legs of a pair of long pants. To demonstrate the function of the organ system using the model, Sam broke a roti into pieces and added some water, which he pushed through the pipe, then mixed them in the plastic bag and then squeezed them through the pants.
Which organ does the plastic bag represent in Sam’s model?
A. Stomach
B. Oesophagus
C. Intestine
D. Pancreas

Answer 1

The human digestive system is made up of the gastrointestinal tract and the digestive organs that support it. Food is broken down into smaller and smaller components during digestion until it can be absorbed and incorporated into the body. The secretions of accessory organs contain various enzymes that help in digesting carbohydrates, proteins and lipids.

Complete answer:
Let us resolve the options with the model analogy created by Sam and find out the correct answer.
Option: A - In Sam’s model the bag in which he mixed the pieces of roti and water is the stomach. The stomach in the alimentary canal serves the function of mixing the chewed food and here the food gets churned and digested.
Thus, Option A is correct.
Option: B – In Sam’s model the long tube which connects to the plastic bag represents the Oesophagus as it is doing the similar function. The chewed food is transferred from buccal cavity to the stomach via Oesophagus or the windpipe and in Sam’s model the plastic bag represents the stomach.
Thus, Option B is incorrect.
Option: C – The leg of the pant which is connected to the plastic bag is representing the intestine of the alimentary canal. It is so because the food from the stomach enters the intestine for absorption. So, the plastic bag is the stomach and the leg of the pants is the intestine.
Thus, Option C is incorrect.
Option: D – Pancreas are not represented in Sam’s model in any way.
So, Option D is also incorrect

Hence, option A. Stomach is the correct answer

Note:
The stomach is a muscular organ found on the upper abdomen's left side. The oesophagus delivers food to the stomach. When food reaches the end of the oesophagus, it passes through a muscle valve known as the lower esophageal sphincter and into the stomach. The stomach produces acid and enzymes that aid in the digestion of meals.