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Human Body & Health

Grade 5 · Stretch challenge · 8 questions · Version PG-U02974-1QHO

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

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

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.