LEARNING OBJECTIVES (अधिगम उद्देश्य)
By the end of the lesson, students will be able to:
English
- Define the nervous system.
- Identify the parts of the nervous system.
- Explain the functions of the brain, spinal cord and nerves.
- Understand reflex actions.
- Appreciate the importance of taking care of the brain.
हिन्दी
- तंत्रिका तंत्र की परिभाषा बता सकेंगे।
- तंत्रिका तंत्र के मुख्य भागों की पहचान करेंगे।
- मस्तिष्क, मेरुरज्जु तथा नसों के कार्य समझेंगे।
- प्रतिवर्ती क्रिया (Reflex Action) को समझेंगे।
- मस्तिष्क की देखभाल के महत्व को जानेंगे।
KEY VOCABULARY (मुख्य शब्दावली)
English
Hindi
Brain
मस्तिष्क
Spinal Cord
मेरुरज्जु
Nerves
नसें
Nervous System
तंत्रिका तंत्र
Sense Organs
ज्ञानेंद्रियाँ
Stimulus
उद्दीपन
Response
प्रतिक्रिया
Reflex Action
प्रतिवर्ती क्रिया
Message
संदेश
Signal
संकेत
TEACHING AIDS
- Human body chart
- Brain model
- Skeleton model
- Flash cards
- Torch
- Bell
- Pictures of sense organs
- Smart board/video
- Activity sheets
PREVIOUS KNOWLEDGE
Ask students:
- Which part of your body helps you think?
- How do you know something is hot?
- Why do you remove your hand quickly from a hot object?
INTRODUCTION (5–10 Minutes)
Teacher rings a bell.
Ask:
Who heard the bell?
Students:
"Our ears."
Teacher:
How did your ears tell your brain?
Explain:
"Our body has a communication system called the Nervous System."
Hindi
"हमारे शरीर में एक संदेश भेजने वाली प्रणाली होती है जिसे तंत्रिका तंत्र कहते हैं।"
STUDY MATERIAL
What is the Nervous System?
English
The nervous system is the control center of our body.
It receives information from different parts of the body, processes it and sends instructions back.
It helps us:
- Think
- Learn
- Remember
- Feel
- Move
- Speak
- See
- Hear
- Taste
- Smell
Without the nervous system, our body cannot work properly.
हिन्दी
तंत्रिका तंत्र हमारे शरीर का नियंत्रण केंद्र है।
यह शरीर के सभी अंगों से जानकारी प्राप्त करता है, उसे समझता है और आवश्यक आदेश वापस भेजता है।
यह हमें—
- सोचने
- सीखने
- याद रखने
- महसूस करने
- चलने
- बोलने
- देखने
- सुनने
में सहायता करता है।
Parts of the Nervous System
There are three main parts.
1. Brain (मस्तिष्क)
The brain is the most important organ.
It is protected by the skull.
Functions
- Thinking
- Learning
- Memory
- Speaking
- Controlling muscles
- Decision making
- Emotions
Hindi
मस्तिष्क शरीर का सबसे महत्वपूर्ण अंग है।
यह खोपड़ी के अंदर सुरक्षित रहता है।
कार्य
- सोचना
- याद रखना
- निर्णय लेना
- भावनाओं को नियंत्रित करना
- शरीर को नियंत्रित करना
2. Spinal Cord (मेरुरज्जु)
The spinal cord is like a thick bundle of nerves.
It connects the brain to the rest of the body.
It passes messages between the brain and the body.
It also controls reflex actions.
Hindi
मेरुरज्जु मस्तिष्क और शरीर को जोड़ती है।
यह संदेशों को आगे-पीछे पहुँचाती है।
3. Nerves (नसें)
Nerves are thin thread-like structures spread throughout the body.
They carry messages.
Hindi
नसें पूरे शरीर में फैली रहती हैं।
ये संदेशों को एक स्थान से दूसरे स्थान तक पहुँचाती हैं।
How Does the Nervous System Work?
Example
You touch a hot pan.
↓
Your skin feels heat.
↓
The nerves send the message.
↓
The spinal cord and brain receive it.
↓
The brain sends another message.
↓
You quickly remove your hand.
Hindi
गरम वस्तु को छूते ही
त्वचा
↓
नसें
↓
मेरुरज्जु
↓
मस्तिष्क
↓
हाथ पीछे हट जाता है।
Sense Organs and Nervous System
Our sense organs collect information.
Sense Organ
Function
Eyes
Seeing
Ears
Hearing
Nose
Smelling
Tongue
Tasting
Skin
Touch
Hindi
ज्ञानेंद्रियाँ जानकारी एकत्र करती हैं और मस्तिष्क तक पहुँचाती हैं।
Reflex Action
Definition
A reflex action is a quick and automatic action without thinking.
Examples
- Sneezing
- Blinking
- Pulling hand away from fire
- Knee jerk
Hindi
प्रतिवर्ती क्रिया बिना सोचे होने वाली तेज प्रतिक्रिया है।
Importance of the Nervous System
It helps us
- Walk
- Write
- Read
- Play
- Think
- Talk
- Learn
- Remember
Care of the Brain
✔ Eat healthy food
✔ Sleep 8–10 hours
✔ Wear a helmet
✔ Exercise daily
✔ Avoid hitting the head
✔ Read books
✔ Solve puzzles
Hindi
- पौष्टिक भोजन खाएँ।
- पर्याप्त नींद लें।
- हेलमेट पहनें।
- रोज व्यायाम करें।
- सिर की सुरक्षा करें।
CLASSROOM ACTIVITIES
Activity 1 – Message Passing Game
Students stand in a line.
Teacher whispers a word.
Students pass the message.
Discuss how nerves pass messages.
Activity 2 – Reflex Test
Drop a ruler.
Students catch it quickly.
Explain reflex action.
Activity 3 – Sense Organ Activity
Blindfold one student.
Ask him/her to identify an object by touching.
BOARD WORK
NERVOUS SYSTEM Brain ↓ Spinal Cord ↓ Nerves Functions Thinking Learning Memory Movement Reflex Action
DIFFERENTIATED LEARNING
Slow Learners
- Picture matching
- Flash cards
- Oral questioning
Advanced Learners
- Draw the nervous system.
- Explain reflex action with examples.
- Research the cerebrum, cerebellum, and medulla.
VALUES DEVELOPED
- Health awareness
- Safety habits
- Observation skills
- Scientific thinking
ASSESSMENT
Oral Questions
- What is the nervous system?
- Which organ controls the body?
- Name the three parts of the nervous system.
- What is reflex action?
- Name five sense organs.
WORKSHEET
Fill in the blanks
- The ______ controls our body.
- The spinal cord connects the brain with the ______.
- Nerves carry ______.
- Blinking is a ______ action.
- Eyes help us to ______.
True or False
- Brain is protected by the skull. ( )
- Nerves carry blood. ( )
- Reflex action is very slow. ( )
- Skin is a sense organ. ( )
- The nervous system controls the body. ( )
Match
A
B
Brain
Thinking
Eyes
Seeing
Nose
Smelling
Tongue
Tasting
Skin
Touching
Short Answer Questions
- What is the nervous system?
- Name the three parts of the nervous system.
- What are nerves?
- What is a reflex action?
- How can we keep our brain healthy?
Long Answer Questions
- Explain the functions of the brain.
- Explain how the nervous system works when we touch a hot object.
- Explain reflex action with a diagram.
- Why is the nervous system important?
- Write five ways to take care of your brain.
HOMEWORK
- Draw and label the nervous system.
- Paste pictures of five sense organs.
- Write five reflex actions.
- Observe five activities controlled by your brain.
- Learn the bilingual vocabulary.