Class 3 EVS Digestive System
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Choose the Correct option.
- Where does digestion begin?
- a) Stomach
- b) Mouth
- c) Small intestine
- d) Esophagus
Answer: b) Mouth
- What is the function of the large intestine?
- a) Breaks down fats
- b) Absorbs water from undigested food
- c) Stores bile juice
- d) Secretes gastric juices
Answer: b) Absorbs water from undigested food
- Which organ produces bile juice?
- a) Stomach
- b) Pancreas
- c) Liver
- d) Esophagus
Answer: c) Liver
- How long is the small intestine approximately?
- a) 5–7 feet
- b) 10 feet
- c) 12 feet
- d) 18 feet
Answer: d) 18 feet
- Which of these is a healthy eating habit?
- a) Eating junk food
- b) Drinking 6–8 glasses of water
- c) Skipping meals
- d) Eating very fast
Answer: b) Drinking 6–8 glasses of water
True or False:
- The process of digestion ends in the stomach.Answer: False
- The tongue helps in mixing saliva with food and contains taste buds.Answer: True
- The small intestine is longer than the large intestine.Answer: True
- Bile juice is secreted by the pancreas and stored in the liver.Answer: False
- Chewing food slowly aids in digestion.Answer: True
Fill in the Blanks:
- Digestion begins in the ________, where teeth chew food and saliva softens it.
Answer: mouth
- The ________ is a muscular tube that carries food from the mouth to the stomach.
Answer: esophagus
- In the stomach, ________ juices help break down food into a paste.
Answer: gastric
- Most nutrients from food are absorbed in the ________, which is about 18 feet long.
Answer: small intestine
- Water is absorbed in the ________, and undigested food is excreted through the anus.
Answer: large intestine
Questions and Answers:
- What is digestion?
Answer: Digestion is the process of breaking down food into smaller particles that can be absorbed by the body.
- 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.
- 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.
- 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.
- 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.
- What is the role of the pancreas in digestion?
Answer: The pancreas secretes juices that help in the digestion of carbohydrates.
- 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.
- 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.
- 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.
- List three healthy eating habits.
Answer:
- Wash your hands before eating.
- Eat lots of fruits and vegetables.
- Avoid eating oily and junk food.
