Grade 4 | Science | Unit 1 - Concept 2 - Lesson 3 - How the nervous system works
Автор: Mr. Raouf Ashraf
Загружено: 2025-10-03
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Functions of the nervous system :
1. It gathers information through the sensory organs like the eyes, ears and skin.
2. It makes sense of (translates) these information through the brain.
3. It tells the body what to do according to these information.
Example:
When the ears pick up sound waves coming from a chirping bird.
The nerves in the ears send a message to the brain, which translates these sound waves.
Then, the brain sends a message to the body about what to do, such as turn to look for the bird on a tree.
Notes
1. Some messages, called "reflexes", are so fast that you cannot realize it such as moving your hand away when touching a very hot cup of tea.
2. Other messages are sent from and to the brain automatically, like the signal to breathe.
Describing the Nervous System
• The parts of the nervous system work together to :
• Sense the environment by sensory organs (such as eyes, nose, tongue ... etc.).
• Send the information to the brain through nerves.
• Process these information to decide the best action by brain.
• Send messages to the body parts by nerves to react to these information.
• Without all of the parts of the nervous system, the person might not receive, send or react to the information.
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MR. RAOUF ASHRAF
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