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Human Body & Health

Grade 4 · On-level practice · 8 questions · Version PG-165GQIA-V1L1

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

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

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.