📚 Class 3 Science – Chapter 2: The Human Body

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🔹 1. Introduction

The human body is a wonderful system made up of many parts that work together to help us live, move, eat, breathe, and sense the world around us.
Learning about the body helps us stay healthy and take care of ourselves.

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🔹 2. Main Parts of the Human Body

1. Head

   • Contains: Brain, eyes, ears, nose, mouth

   • Functions:

     • Brain controls all body activities

     • Eyes help to see

     • Ears help to hear

     • Nose helps to smell

     • Mouth helps to eat, talk, and breathe

2. Neck

   • Joins the head to the body

   • Allows the head to move in different directions

3. Hands and Arms

   • Help in holding, carrying, writing, and touching objects

   • Fingers are used for picking up small things

4. Legs and Feet

   • Help in walking, running, jumping, and standing

5. Chest and Abdomen

   • Chest: Contains heart and lungs

     • Heart pumps blood

     • Lungs help in breathing

   • Abdomen: Contains stomach, intestines, and other organs for digestion and absorption of food

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🔹 3. Five Senses

The human body has five senses that help us understand the world:

Sense	Organ	Function
Sight	Eyes	To see things
Hearing	Ears	To hear sounds
Smell	Nose	To smell odors
Taste	Tongue	To taste food
Touch	Skin	To feel objects, hot, cold, or pain

💡 Tip: Protect your senses, e.g., wear sunglasses, avoid loud noise, wash hands, and eat healthy food.

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🔹 4. How the Body Works

• The body moves because of muscles and bones

• The body breathes using lungs

• The body digests food using stomach and intestines

• The body circulates blood using the heart and blood vessels

• The body senses the environment using the five senses

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🔹 5. Keeping the Body Healthy

1. Eat healthy food – fruits, vegetables, grains, proteins

2. Drink plenty of water – keeps body hydrated

3. Exercise daily – running, walking, yoga, and games

4. Sleep well – gives energy and helps growth

5. Keep clean – wash hands, brush teeth, bathe regularly

6. Avoid harmful habits – do not eat junk food often

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🔹 6. Important Organs and Their Functions

Organ	Function
Brain	Controls the body and thoughts
Heart	Pumps blood to all body parts
Lungs	Help in breathing
Stomach	Digests food
Skin	Protects the body and senses touch
Eyes	See the world
Ears	Hear sounds
Tongue	Taste food

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🔹 7. Practice Questions / Revision

1️⃣ Name the main parts of the human body.
✅ Answer: Head, Neck, Hands/Arms, Legs/Feet, Chest/Abdomen

2️⃣ What are the five senses?
✅ Answer: Sight, Hearing, Smell, Taste, Touch

3️⃣ Which organ helps in pumping blood?
✅ Answer: Heart

4️⃣ How can we keep our body healthy?
✅ Answer: Eat healthy, exercise, sleep well, drink water, and keep clean

5️⃣ Which organ helps in breathing?
✅ Answer: Lungs

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🔹 8. Summary

• Human Body: A system of organs that work together

• Main Parts: Head, Neck, Arms/Hands, Legs/Feet, Chest, Abdomen

• Five Senses: Eyes, Ears, Nose, Tongue, Skin

• Important Organs: Brain, Heart, Lungs, Stomach

• Healthy Habits: Food, Water, Exercise, Sleep, Cleanliness