The Heart at Work

Lab Brief #8

🎯 Your mission

Understand the idea. Then look for it everywhere.

⚡ The twist

Living things break the rules of non-living things — find the rule they break.

What you'll learn

The heart pumps blood through blood vessels to deliver oxygen and nutrients to every cell in the body. It beats about 100,000 times per day.

Key words

cell
The tiny building block that makes up all living things.

Make a hypothesis first

Predict: what will happen to the plant if you change the water?

Say your guess out loud — then find out if you were right.

Step 1 of 4 · Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 of 4 · Do

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.

Step 3 of 4 · Observe

Draw a detailed diagram of what you observe.

Step 4 of 4 · Record

Write a conclusion: what did your results show? Did they match your prediction?

Question 1 of 3

What is the function of the heart?

How sure are you?😐 maybe

Question 2 of 3

What is the largest organ of the human body?

How sure are you?😐 maybe

Question 3 of 3

What carries oxygen in the blood?

How sure are you?😐 maybe

Mind = blown

🦠 You have more bacterial cells in your body than human cells.

Nice work!

You got 0 of 3 right.

Next: Blood Cells and Platelets All lessons

🎯

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✨ More to explore

🌍 Where you see this in real life: This is why plants grow toward windows and why scabs form.

🏆 Stretch challenge (try it this week): Watch a plant or pet for 5 minutes today and write down what you noticed.

👨‍👩‍👧 For the dinner table: “Tell me something you noticed about your own body today.”

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