Science Secrets · Drawing 25 of 40
My Heart Picks Up the Pace
The Human Body
When you move, your muscles need more oxygen. Your heart beats faster to send them more blood. After playing, you can feel your pulse, the beat of your heart, slow down little by little.
Did you know?
The heart is a muscle that pumps blood.
Look together
What do you notice in your body after playing?
An idea to try
With an adult, gently find your wrist pulse at rest. Then compare it after some comfortable movement you enjoy.
For the adult reading along
A little more to discover
Heart rate varies with activity and many other factors. This page invites observation without giving an expected value or assessing the child’s health.
Sources and illustration notes (1)
Simplified scene and shapes. Models, imagined comparisons and enlargements do not preserve all real measurements.
These links lead to other websites. Explore them with an adult. References identify the institution and the related lesson; some linked pages are in French.
- Nemours KidsHealth: Your Heart & Circulatory SystemWhen you run around a lot, your body needs more oxygen-filled blood, so your heart pumps faster; the heart is a muscle that pumps blood; you can feel your pulse on the inside of the wrist.
Page prepared on October 12, 2026. Illustrations are simplified for colouring.
This drawing is from the book Science Secrets to Colour
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