Online Shiksha

By Savita S. More

Class 3 EVS Digestive System

Fill in the Blanks:

  1. Digestion begins in the ________, where teeth chew food and saliva softens it.

Answer: mouth 

  1. The ________ is a muscular tube that carries food from the mouth to the stomach.

Answer: esophagus 

  1. In the stomach, ________ juices help break down food into a paste.

Answer: gastric 

  1. Most nutrients from food are absorbed in the ________, which is about 18 feet long.

Answer: small intestine 

  1. Water is absorbed in the ________, and undigested food is excreted through the anus.

Answer: large intestine 

 

Questions and Answers:

 

  1. What is digestion?

Answer: Digestion is the process of breaking down food into smaller particles that can be absorbed by the body.

 

  1. Which organs are involved in digestion?

Answer: The organs involved in digestion are the mouth, food pipe (esophagus), stomach, small intestine, liver, pancreas, large intestine, and anus.

 

  1. What role does saliva play in digestion?

Answer: Saliva, secreted by salivary glands, helps soften food and aids in breaking it down further for digestion.

 

  1. What is the function of the tongue during digestion?

Answer: The tongue helps in mixing saliva with food, making it easier to swallow. It also contains taste buds to identify sweet, sour, salty, and bitter tastes.

 

  1. What happens to food in the stomach?

Answer: In the stomach, food is stored for several hours, and gastric juices break it down into a paste before it moves to the small intestine.

 

  1. What is the role of the pancreas in digestion?

Answer: The pancreas secretes juices that help in the digestion of carbohydrates.

 

  1. Where is bile juice stored, and what is its role?

Answer: Bile juice is stored in the gallbladder and helps in breaking down fats during digestion in the small intestine.

 

  1. How is the small intestine important for digestion?

Answer: The small intestine absorbs most nutrients from food into the blood after breaking it into fine particles with the help of pancreatic and bile juices.

 

  1. What happens to undigested food in the large intestine?

Answer: In the large intestine, water is absorbed from undigested food, and the remaining waste is sent out of the body through the anus.

 

  1. List three healthy eating habits.

 Answer: 

  • Wash your hands before eating. 
  • Eat lots of fruits and vegetables. 
  • Avoid eating oily and junk food. 

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