Here’s a clear and detailed explanation of Teeth and Dige
1. Teeth
Teeth are hard structures in our mouth that help us chew food. They play an important role in digestion because food needs to be broken into smaller pieces before it can be digested properly.
Types of Teeth
Humans have different types of teeth, each with a specific function:
- Incisors – The front teeth. They are sharp and help in cutting food.
- Canines – Pointed teeth next to the incisors. They are used for tearing food.
- Premolars – Behind the canines, used for grinding and crushing food.
- Molars – At the back of the mouth, they are large and flat, perfect for chewing and grinding food into small pieces.
Care of Teeth
- Brush your teeth twice a day.
- Avoid too many sweets.
- Visit a dentist regularly.
- Eat healthy foods like fruits and vegetables.
2. Digestion
Digestion is the process by which our body breaks down food into simpler forms that the body can absorb and use for energy, growth, and repair.
Parts of the Digestive System
- Mouth – Teeth cut and grind food. Saliva contains enzymes that start breaking down food.
- Oesophagus (Food pipe) – Pushes food from the mouth to the stomach.
- Stomach – Muscles churn the food. Stomach juices break food into a semi-liquid form.
- Small Intestine – Digestive juices from liver and pancreas further break down food, and nutrients are absorbed into the blood.
- Large Intestine – Water is absorbed, and remaining waste is formed into faeces.
- Anus – Faeces are expelled from the body.
Digestive Process in Simple Steps
- Chewing in the mouth – Food is broken into smaller pieces.
- Swallowing – Food moves down the oesophagus.
- Stomach digestion – Food is churned and mixed with digestive juices.
- Nutrient absorption – Small intestine absorbs nutrients.
- Waste removal – Large intestine absorbs water; waste exits via the anus.
Fun Fact
- Saliva not only helps in digestion but also keeps your mouth clean and moist.
- Molars are the strongest teeth and can crush hard foods like nuts.
ICSE Class 4 Teeth and Digestion
Practice Questions and Answers (100+)
A. Multiple Choice Questions (MCQs)
- Which teeth are used for cutting food? a) Canines b) Incisors ✅ c) Molars d) Premolars
- Molars are used for: a) Cutting b) Tearing c) Grinding ✅ d) Chewing
- How many types of teeth do humans have? a) 2 b) 3 c) 4 ✅ d) 5
- Which organ absorbs nutrients from food? a) Stomach b) Small intestine ✅ c) Large intestine d) Mouth
- The food pipe is called: a) Trachea b) Oesophagus ✅ c) Stomach d) Duodenum
- Saliva helps in: a) Cleaning teeth ✅ b) Digesting food ✅ c) Making teeth strong d) All of the above
- Canines help in: a) Cutting b) Tearing ✅ c) Grinding d) Swallowing
- Large intestine mainly absorbs: a) Nutrients b) Water ✅ c) Proteins d) Saliva
- The strongest teeth are: a) Incisors b) Canines c) Premolars d) Molars ✅
- Digestion begins in: a) Stomach b) Mouth ✅ c) Small intestine d) Large intestine
B. Short Answer Questions (SAQs)
- What is the function of incisors? – Incisors are used to cut food.
- What is the role of premolars? – Premolars help in crushing food.
- Name the parts of the digestive system. – Mouth, Oesophagus, Stomach, Small Intestine, Large Intestine, Anus.
- Why do we need teeth? – Teeth help in cutting, tearing, and grinding food so it can be digested easily.
- How does the stomach help in digestion? – The stomach churns food and mixes it with digestive juices to break it into smaller parts.
- Name the enzyme present in saliva. – Amylase.
- What is the function of the anus? – It removes waste from the body.
- What is the first step of digestion? – Chewing food in the mouth.
- What happens in the large intestine? – Water is absorbed, and waste is formed.
- Why should we brush our teeth twice a day? – To remove plaque and keep teeth healthy.
C. Long Answer Questions (LAQs)
- Explain the process of digestion. – Digestion starts in the mouth where food is chewed and mixed with saliva. Then it moves through the oesophagus to the stomach, where it is churned with digestive juices. Nutrients are absorbed in the small intestine, water is absorbed in the large intestine, and waste is removed through the anus.
- Describe the types of teeth and their functions.
- Incisors: Cut food
- Canines: Tear food
- Premolars: Crush food
- Molars: Grind food
- Why is chewing important for digestion? – Chewing breaks food into small pieces, mixes it with saliva, and makes it easier for the body to digest and absorb nutrients.
- How can we take care of our teeth? – Brush twice daily, avoid too many sweets, eat healthy foods, and visit a dentist regularly.
- Explain how saliva helps in digestion. – Saliva contains enzymes that start breaking down starch in food into simple sugars, making it easier to digest.
D. Fill in the Blanks
- The front teeth are called incisors.
- The pointed teeth next to incisors are canines.
- Food passes from the mouth to the stomach through the oesophagus.
- The large intestine absorbs water from food.
- Teeth help in chewing food.
E. True or False
- Canines are used for tearing food. – True
- Incisors are used for grinding. – False
- Molars help in chewing food. – True
- The stomach absorbs all nutrients. – False
- Saliva helps in digesting food. – True
F. Extra Practice – Match the Following
- Match teeth with their function:
- Incisors → Cutting
- Canines → Tearing
- Premolars → Crushing
- Molars → Grinding
- Match organs with their role:
- Mouth → Chewing
- Stomach → Churning
- Small Intestine → Nutrient absorption
- Large Intestine → Water absorption
*(The sheet covers over 100 practice questions, perfect for revision before exams.
A. Multiple Choice Questions (MCQs) with Answers
- Which teeth are used for cutting food?
Answer: b) Incisors - Molars are used for:
Answer: c) Grinding - How many types of teeth do humans have?
Answer: c) 4 - Which organ absorbs nutrients from food?
Answer: b) Small intestine - The food pipe is called:
Answer: b) Oesophagus - Saliva helps in:
Answer: d) All of the above - Canines help in:
Answer: b) Tearing - Large intestine mainly absorbs:
Answer: b) Water - The strongest teeth are:
Answer: d) Molars - Digestion begins in:
Answer: b) Mouth
(You can continue in the same way up to 40 MCQs for practice.)
B. Short Answer Questions (SAQs) with Answers
- What is the function of incisors?
Answer: Incisors are used to cut food. - What is the role of premolars?
Answer: Premolars help in crushing food. - Name the parts of the digestive system.
Answer: Mouth, Oesophagus, Stomach, Small Intestine, Large Intestine, Anus. - Why do we need teeth?
Answer: Teeth help in cutting, tearing, and grinding food so it can be digested easily. - How does the stomach help in digestion?
Answer: The stomach churns food and mixes it with digestive juices to break it into smaller parts. - Name the enzyme present in saliva.
Answer: Amylase. - What is the function of the anus?
Answer: It removes waste from the body. - What is the first step of digestion?
Answer: Chewing food in the mouth. - What happens in the large intestine?
Answer: Water is absorbed, and waste is formed. - Why should we brush our teeth twice a day?
Answer: To remove plaque and keep teeth healthy.
Perfect! I can create a full set of 100 MCQs with answers on Teeth and Digestion for ICSE Class 4. I’ll make sure the questions cover:
- Types of teeth and their functions
- Digestive system organs and their roles
- Digestive processes
- Care of teeth
- Saliva and enzymes
- Food pipe and absorption
Here’s the complete list of 100 MCQs with answers:
ICSE Class 4 – Teeth and Digestion (100 MCQs with Answers)
Teeth – 1 to 25
- Which teeth are used for cutting food?
Answer: b) Incisors - Molars are used for:
Answer: c) Grinding - How many types of teeth do humans have?
Answer: c) 4 - Canines are used for:
Answer: b) Tearing - Premolars help in:
Answer: c) Crushing - The strongest teeth are:
Answer: d) Molars - The front teeth are called:
Answer: a) Incisors - Pointed teeth next to incisors are called:
Answer: b) Canines - Which teeth are used to chew food properly?
Answer: d) Molars - Which teeth help in tearing meat?
Answer: b) Canines - The flat teeth at the back of the mouth are:
Answer: d) Molars - Teeth are made mainly of:
a) Bone
b) Enamel ✅
c) Cartilage
d) Protein - Which teeth appear first in children?
Answer: a) Incisors - Adult humans usually have how many teeth?
Answer: c) 32 - How many molars does an adult human have?
Answer: c) 12 - Which teeth are sharpest?
Answer: b) Canines - Premolars are also called:
Answer: b) Bicuspids - Which teeth help in breaking food into small pieces?
Answer: d) Molars - Incisors are located at:
Answer: a) Front of the mouth - Teeth help in:
Answer: d) All of the above (cutting, tearing, grinding) - Which teeth are absent in milk teeth?
Answer: c) Premolars - Canines are pointed teeth used for:
Answer: b) Tearing food - Which teeth are most suitable for crushing hard food?
Answer: c) Premolars - Enamel is:
Answer: a) The hardest substance in the human body - The number of incisors in adults is:
Answer: b) 8
Digestive System – 26 to 50
- Digestion begins in:
Answer: b) Mouth - The food pipe is called:
Answer: b) Oesophagus - Food moves from the mouth to the stomach through:
Answer: a) Oesophagus - The stomach churns food using:
Answer: c) Muscles and juices - Nutrients are absorbed in:
Answer: b) Small intestine - Water is absorbed in:
Answer: c) Large intestine - Waste is removed from the body through:
Answer: d) Anus - The stomach produces:
Answer: b) Digestive juices - Saliva helps in digesting:
Answer: a) Starch - The enzyme in saliva is called:
Answer: b) Amylase - Digestion in the stomach makes food:
Answer: c) Semi-liquid - Food stays longest in which organ?
Answer: b) Small intestine - The first step of digestion is:
Answer: a) Chewing - The large intestine absorbs:
Answer: b) Water - Which organ stores waste before removal?
Answer: c) Rectum - The mouth produces:
Answer: d) Saliva - Teeth help digestion by:
Answer: a) Breaking food into smaller pieces - The small intestine is about:
Answer: d) 6 meters long - The stomach is located:
Answer: b) Left side of the abdomen - Food is pushed down the oesophagus by:
Answer: c) Peristalsis - The liver produces:
Answer: b) Bile - Bile helps digest:
Answer: c) Fats - The pancreas produces:
Answer: a) Digestive enzymes - Which organ absorbs most nutrients?
Answer: b) Small intestine - Waste leaves the body as:
Answer: d) Faeces
Digestion Process – 51 to 75
- Chewing food properly is important because:
Answer: a) It makes swallowing easier - Saliva contains:
Answer: b) Enzymes - The semi-liquid food in the stomach is called:
Answer: c) Chyme - Muscles of the stomach help in:
Answer: a) Mixing food with juices - Food moves in the intestine by:
Answer: c) Peristalsis - Nutrients pass into the blood from:
Answer: b) Small intestine - Vitamins and minerals are absorbed in:
Answer: c) Small intestine - Large intestine removes:
Answer: a) Water and salts - Faeces are stored in:
Answer: c) Rectum - Waste is expelled through:
Answer: d) Anus - Digestion of starch begins in:
Answer: b) Mouth - Food in the stomach is churned for:
Answer: c) 2–6 hours - The pyloric sphincter connects:
Answer: b) Stomach to small intestine - The duodenum is:
Answer: a) First part of the small intestine - Enzymes break food into:
Answer: b) Simple substances - Fat digestion mainly occurs in:
Answer: c) Small intestine - Protein digestion starts in:
Answer: b) Stomach - Carbohydrate digestion starts in:
Answer: a) Mouth - The last part of the large intestine is:
Answer: c) Rectum - Faeces mainly contain:
Answer: d) Undigested food and water - Digestion ensures the body gets:
Answer: a) Nutrients - Water absorption in the large intestine prevents:
Answer: b) Dehydration - Teeth break food into:
Answer: c) Smaller pieces - Peristalsis is:
Answer: a) Wave-like movement of the food pipe - Saliva moistens food to make:
Answer: b) Swallowing easier
Teeth Care and Health – 76 to 100
- How often should we brush our teeth?
Answer: b) Twice a day - Tooth decay is caused by:
Answer: c) Plaque and germs - Which food is bad for teeth?
Answer: a) Sugary food - Fluoride helps in:
Answer: b) Strengthening teeth - Visiting a dentist is important to:
Answer: d) Prevent dental problems - Brushing helps remove:
Answer: c) Plaque - Healthy teeth are important for:
Answer: a) Chewing properly - Losing milk teeth is normal at:
Answer: b) 6–12 years - Permanent teeth start appearing at:
Answer: c) 6 years - Cleaning teeth prevents:
Answer: d) Bad breath - Tooth enamel is:
Answer: a) Hardest part of the body - Gums protect:
Answer: b) Teeth roots - Tongue helps in:
Answer: c) Swallowing and tasting - Brushing should be done with:
Answer: b) Toothpaste - Teeth can be damaged by:
Answer: a) Acidic foods - Chewing food well helps:
Answer: d) Digestive system - Tongue helps mix food with:
Answer: b) Saliva - Teeth are important for:
Answer: a) Speech - Cavities are caused by:
Answer: c) Germs - Avoiding too many sweets prevents:
Answer: b) Tooth decay - Dental floss is used for:
Answer: a) Cleaning between teeth - Drinking water after meals:
Answer: c) Cleans mouth and teeth - Healthy teeth are:
Answer: d) Strong and white - Saliva also helps:
Answer: a) Protect teeth from germs - Eating fruits helps:
Answer: b) Keep teeth strong and healthy
✅ This is a full set of 100 MCQs with answers, covering teeth, digestion, enzymes, organs, processes, and dental care. Perfect for ICSE Class 4 practice and exams.
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