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Science Class 3 - Human Body Notes

Comprehensive study notes for Class 3 - Human Body olympiad preparation

Human Body

Welcome to the chapter on Human Body for Class 3. In this chapter, you will learn about the different parts of the human body, their functions, and how to keep your body healthy. By the end of this chapter, you will know the names of body parts, what they do, and how to take care of yourself!

Introduction

The human body is amazing! It is made up of many parts that work together to help us live, move, and grow. Let’s learn about these parts and their jobs.

Main Parts of the Human Body

  • Head: Contains the brain, eyes, ears, nose, and mouth.
  • Neck: Connects the head to the rest of the body.
  • Arms and Hands: Help us lift, hold, write, and play.
  • Legs and Feet: Help us stand, walk, run, and jump.
  • Chest: Protects the heart and lungs.
  • Stomach: Helps digest food.
  • Back: Supports the body and helps us stand straight.

Sense Organs

  • Eyes: Help us see.
  • Ears: Help us hear.
  • Nose: Helps us smell.
  • Tongue: Helps us taste.
  • Skin: Helps us feel touch, heat, and cold.

How to Keep Your Body Healthy

  • Eat healthy food like fruits and vegetables.
  • Drink clean water.
  • Exercise and play every day.
  • Sleep well at night.
  • Keep your body clean by bathing and washing hands.

Fun Activity: Draw and Label

Draw a picture of a human body. Label the head, arms, legs, chest, and sense organs.

Summary

  • The human body has many parts that work together.
  • Sense organs help us see, hear, smell, taste, and feel.
  • We must take care of our body to stay healthy.

Practice Questions

  1. Name three sense organs.
  2. What does the heart do?
  3. Why should we wash our hands?
  4. Which part of the body helps us walk?
  5. How can you keep your body healthy?

Challenge Yourself

  • Make a chart of healthy habits you follow every day.
  • List five things you can do with your hands.

Did You Know?

  • Your heart beats about 100,000 times every day!
  • Bones give shape and support to our body.

Glossary

  • Sense Organ: A body part that helps us sense the world.
  • Healthy: Feeling well and strong.
  • Digest: To break down food in the stomach.

Answers to Practice Questions

  1. Eyes, ears, nose (any three: eyes, ears, nose, tongue, skin).
  2. It pumps blood to all parts of the body.
  3. To keep germs away and stay healthy.
  4. Legs and feet.
  5. Eat healthy food, exercise, sleep well, keep clean.

Take care of your body and stay healthy and strong!

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