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Body systems & growing up

Grade 4 · Health & Wellness · Free lesson

Hi there! I am Studyfin. Let's explore how your amazing body systems work together as you grow!

Your body has special systems that do important jobs. The nervous system is like your body's computer. It includes your brain, spinal cord, and nerves.

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Your brain sends fast signals down your spinal cord. These signals travel through nerves to your muscles. This lets you move, feel, and think.

BrainNervous System Signals

Other systems protect and fuel you. Your skin is the integumentary system. It covers you. Your immune system fights germs. Your digestive system breaks down food.

Immune ShieldGermThe Immune System Protects You
✏️ Worked example

Let's explain how your nervous system and digestive system work together when you feel hungry and eat an apple.

  1. First, your empty stomach sends a signal up your spinal cord to your brain.
  2. Next, your brain reads this signal and makes you feel hungry.
  3. Then, your brain tells your hand to pick up the sweet apple.
  4. Finally, you chew the apple. Your digestive system starts to break it down for energy.
indian school children
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