Exercise, Heart, and Lungs Word Search
- Free
- No account
- Answer key
- Challenge
- About 18 min
- 10 words
A Grade 4 exercise puzzle with an answer key, body-system definitions, and a safe pulse observation for a home or classroom activity.
For parents and caregivers
What your child will practice
- Explain how the heart, lungs, blood, oxygen, and muscles work together during activity.
- Compare pulse and breathing observations before and after safe, self-paced movement.
How to use this puzzle at home
- Review the word bank and trace the path from breathing in oxygen to blood carrying it toward working muscles.
- Have your child complete the puzzle, then use five vocabulary words to explain what changes during exercise.
- Only try the extension with comfortable, self-paced movement, adult supervision, and any needed health accommodations.
Word List
- HEART
- LUNGS
- PULSE
- OXYGEN
- EXERCISE
- MUSCLES
- BREATHE
- ENDURANCE
- RECOVERY
- CIRCULATION
Printable Puzzle
Vocabulary guide
Use these short definitions before or after the word search. Ask your child to explain a few in their own words.
- Heart
- A muscular organ that pumps blood through vessels around the body.
- Lungs
- Organs where oxygen enters the blood and carbon dioxide leaves it.
- Pulse
- A rhythmic beat felt in an artery as the heart pumps blood.
- Oxygen
- A gas used by body cells to release energy from nutrients.
- Exercise
- Movement that challenges the body and can support physical fitness.
- Muscles
- Tissues that contract to move body parts and maintain posture.
- Breathe
- To move air into and out of the lungs during respiration.
- Endurance
- The ability to continue an activity for an extended period of time.
- Recovery
- The process of returning toward a resting state after activity.
- Circulation
- The continuous movement of blood through the heart, vessels, and body.
Talk about the science
- Why do breathing rate and pulse often increase during exercise?
- How does circulation connect the lungs with working muscles?
- What signs can tell a person to slow down, rest, or ask an adult for help?
Try one more thing
Extension activity
Observe breathing or count a pulse at rest, complete one minute of comfortable movement or a seated alternative, and observe again. Record the change and recovery without comparing results between people.
Teacher and tutor note
Classroom adaptation
Students complete the puzzle, annotate a simple heart-lungs-muscles flow diagram, and compare noncompetitive pulse or breathing observations before and after optional movement, with an equivalent seated choice.
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