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Body Lab 3-5 / Week 04 / Body Lab Day
6/6
Week 04 · Heart and Blood

Body Lab Day

Body Lab Day: Pulse Data
// The pump and its delivery roads
⏱ about 15 min

Body Lab Day: Pulse Data

The whole family gathers in the living room. Rocket holds a clipboard. Raven holds a timer.

"Today we are pulse scientists," Rocket says. "Rest first, then move!"

Raven asks, "What do you notice when we compare the numbers?"

Nova hovers above the clipboard. "Draw your bars carefully," she says. "Then let the graph tell the story."

  1. The heart is a muscle about the size of your fist.
  2. It has four chambers: two atria on top and two ventricles below.
  3. Arteries carry blood away. Veins bring it back. Capillaries link them.
  4. Your pulse is each squeeze of your heart, felt at the wrist.
  5. Moving makes the heart beat faster to bring oxygen to muscles.
◇ PULSE DATA LAB
Each person who wants to join sits and rests for a few minutes.
A grown-up times 15 seconds while each person counts their wrist pulse.
Multiply each count by 4. Write it in the Resting column.
Everyone does jumping jacks or marches in place for two minutes.
Count again right away for 15 seconds. Multiply by 4. Write it in the After moving column.
Draw a bar graph with two bars for each person: resting and after moving.
Compare the bars. Which bar is taller for each person?
Safety first
Clear a space so nobody bumps into furniture.
Move at your own pace. Stop and rest any time you want.
Press gently on the wrist. Sit down to count.
Joining is a choice. Anyone can be the timer or the graph maker instead.
ScientistResting (beats in one minute)After moving (beats in one minute)
For a grown-up
Every body is different, so every number is fine.
Talk about the pattern, not whose number is bigger.
Questions about anyone's heart? Ask a doctor or nurse.
BODY LAB CHECK
  • Read the question.
  • Tap your answer.
In most tests, which bar is usually taller?
Why did we count for 15 seconds every time?
Blood vessels that carry blood away from the heart are ____.
The heart has ____ chambers.

Amazing data, pulse scientists! Next week we follow the oxygen back to where it starts: the lungs.

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