Lesson 68 of 84 · The Human Body
Simulation⭐ 30 XP🌿 Wild JungleMuscles: How You Move (Part 4)
The Human Body.
🎯 Your mission
Push the limits. See what changes.
⚡ The twist
Living things break the rules of non-living things — find the rule they break.
Mind = Blown
🦠 You have more bacterial cells in your body than human cells.
Make a hypothesis first
Predict: what will happen to the plant if you change the water?
What You'll Learn
Muscles work in pairs to move bones. When one muscle contracts (gets shorter), the opposite muscle relaxes (gets longer). The biceps and triceps are an example of this pairing.
Key Words
- stimulus
- response
- reflex
Steps
Read the introduction and identify the main idea of this lesson.
Map your pulse: measure your heart rate at rest, after 1 minute of walking, and after 1 minute of jumping. Create a bar graph and explain the differences.
Observe what happens and describe it in detail.
Record your observations in your science journal with measurements and descriptions.
Check Your Understanding
Question 1
1 of 3What connects muscles to bones?
Where you see this in real life
Your own body is doing this thousands of times every second.
Stretch Challenge
Try this in real life this week.
Find one thing about your body that's different from a friend's. Wonder why.
For the dinner table
“Tell me something you noticed about your own body today.”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
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