Question

Why do you think the stomach is structured like a bag rather than a tube like oesophagus​
​​

Answer 1

ANSWER :-

The stomach is a muscular bag whose principal function in most groups is acidification and maceration of the food to the liquid state and temporary storage until it is passed to the intestine. Hence stomach is structured like a bag rather than a tube like oesophagus

Answer 2

$\huge{\mathcal{\purple{A}\green{N}\pink{S}\blue{W}\purple{E}\green{R}\pink{!}}}$

The bag-like structure of the stomach helps keep the food stored in the stomach for some time. 

This is needed as food needs to be mixed with digestive juices and enzymes in the stomach and mixed so that the enzymes can act on the food. 

This requires time and can only happen if the food is kept stored for some duration. 

If the stomach would have been tube shaped like the oesophagus, this would not have happened, food would have passed directly into the intestine and digestion would not have been completed.