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Human Body & Health

Grade 4 · On-level practice · 8 questions · Version PG-14HJ4CG-V1L1

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1.What do kidneys remove from blood?
2.Why does heart rate rise during exercise?
3.How do vaccines help?
4.Which cells carry oxygen?
5.What maintains stable internal conditions?
6.How do lungs and circulation interact?
7.Why is a balanced diet useful?
8.What carries oxygen from lungs to cells?

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 2
  1. What do kidneys remove from blood?Wastes and extra water
  2. Why does heart rate rise during exercise?Muscles need oxygen and nutrients faster
  3. How do vaccines help?They prepare immunity to recognize a pathogen
  4. Which cells carry oxygen?Red blood cells
  5. What maintains stable internal conditions?Homeostasis
  6. How do lungs and circulation interact?Lungs add oxygen to blood, which carries it to cells
  7. Why is a balanced diet useful?It supplies varied nutrients
  8. What carries oxygen from lungs to cells?The circulatory system

Worked example

Connect a structure to its function and explain how body systems work together.

Common mistake

Naming an organ without explaining its system role.

Helpful hint

Trace what enters, changes, and leaves the system.