Grade 3 · Science · Challenge
Free Human Body & Health worksheet - version 4
Grade 3 human body & health practice with original questions, explanations, and difficulty-matched printable versions. This printable version includes 8 grade-appropriate questions and a separate answer sheet.
Human Body & Health
Grade 3 · Stretch challenge · 8 questions · Version PG-L46CG9-WAAR
1.What maintains stable internal conditions?
2.Why is a balanced diet useful?
3.How do lungs and circulation interact?
4.What do kidneys remove from blood?
5.What carries oxygen from lungs to cells?
6.What is the immune system's job?
7.Why does heart rate rise during exercise?
8.Which cells carry oxygen?
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
- What maintains stable internal conditions?Homeostasis
- Why is a balanced diet useful?It supplies varied nutrients
- How do lungs and circulation interact?Lungs add oxygen to blood, which carries it to cells
- What do kidneys remove from blood?Wastes and extra water
- What carries oxygen from lungs to cells?The circulatory system
- What is the immune system's job?Defend against harmful pathogens
- Why does heart rate rise during exercise?Muscles need oxygen and nutrients faster
- Which cells carry oxygen?Red blood 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.