Class 4 Exam > Class 4 Notes > Science for Class 4 > Worksheet: Digestive System - 1
Class 4 Science - Digestive System - CBSE Worksheets - 1
Q1: Give one word for the following.
(i) The part of the digestive system where digestion begins.
(ii) The outer most layer of the tooth.
(iii) The first set of teeth a child gets.
(iv) The inner most part of the tooth with nerve endings.
Q2: Choose the correct option.
(i) The undigested food is passed to ______________ where most of the water is absorbed back from the food before being passed to the rectum.
(a) small intestine
(b) large intestine
(c) anus
(d) stomach
(ii) Part of the teeth that is visible and not covered by the gum.
(a) Dentine
(b) Crown
(c) Pulp
(d) Root
(iii) Number of milk teeth that a child has are
(a) 22
(b) 20
(c) 28
(d) 30
(iv) Teeth used for tearing food are
(a) premolars
(b) molars
(c) canines
(d) incisors
Q3: Fill in the blanks.
(i) ______________ present in the mouth makes the food soft and turns it sweet.
(ii) In the small intestine, ______________ from liver and pancreatic juice from pancreas are added to the food to digest it completely.
(iii) From the mouth, the food gets swallowed into a pipe also known as ______________.
(iv) ______________ protects the innermost part of the tooth called the pulp.
Q4: True & False.
(i) Saliva in the mouth converts starch in the food to sugar.
(ii) Molars are the toughest among all types of teeth.
(iv) Milk is essential for strong and healthy teeth.
(v) Liver takes the food to the stomach.
(vi) Babies are born with permanent teeth.
Q5: Match the teeth with its correct name and action.
Q6: Answer the following questions in brief.
(i) What is digestion? List the organs of the digestive system.
(ii) List some healthy eating habits.
(iii) What is the role of the small intestine in digesting food?
(iv) List any three ways by which we can keep our teeth healthy and sparkling.
(v) Name the four types of teeth.
Q7: Answer the following questions in detail.
(i) Explain different parts of tooth in humans.
(ii) Describe the process of digestion that takes place in the stomach.
(iii) Label the following parts of the tooth. Draw the same diagram on your own.
You can find Worksheets Solutions here: Worksheet Solutions: Digestive System - 1
The document Class 4 Science - Digestive System - CBSE Worksheets - 1 is a part of the Class 4 Course Science for Class 4.
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FAQs on Class 4 Science - Digestive System - CBSE Worksheets - 1
| 1. What are the main organs of the digestive system and their functions? |  |
Ans.The main organs of the digestive system include the mouth, esophagus, stomach, small intestine, large intestine, liver, pancreas, and gallbladder. Each organ plays a crucial role: the mouth begins the digestion process through chewing and saliva; the esophagus transports food to the stomach; the stomach further breaks down food with acids and enzymes; the small intestine absorbs nutrients; the large intestine reabsorbs water and processes waste; the liver produces bile for fat digestion; the pancreas produces digestive enzymes and regulates blood sugar.
| 2. How does the digestive process work from start to finish? | |
Ans.The digestive process begins in the mouth, where food is chewed and mixed with saliva. It then travels down the esophagus to the stomach, where it is mixed with gastric juices. From the stomach, the partially digested food moves into the small intestine, where most nutrient absorption occurs. The remaining waste then passes into the large intestine, where water is absorbed, and finally, the waste is expelled from the body through the rectum.
| 3. What role do enzymes play in digestion? | |
Ans.Enzymes are biological catalysts that speed up chemical reactions in the body, including the breakdown of food. In digestion, specific enzymes are produced by the salivary glands, stomach, pancreas, and small intestine to break down carbohydrates, proteins, and fats into smaller molecules that can be absorbed by the body.
| 4. What are the common digestive disorders and their symptoms? | |
Ans.Common digestive disorders include gastroesophageal reflux disease (GERD), irritable bowel syndrome (IBS), celiac disease, and ulcers. Symptoms can vary but often include heartburn, bloating, abdominal pain, diarrhea, constipation, and nausea. It's essential to consult a healthcare provider for proper diagnosis and treatment.
| 5. How can one maintain a healthy digestive system? | |
Ans.To maintain a healthy digestive system, one should eat a balanced diet rich in fiber, stay hydrated, exercise regularly, and manage stress. Avoiding excessive intake of processed foods, alcohol, and high-fat meals can also help promote good digestive health. Additionally, it's important to listen to your body and address any digestive issues promptly.
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