Grade 3 · Science · Challenge
Free Human Body & Health worksheet - version 6
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-KK752B-WAAR
1.How do lungs and circulation interact?
2.How do vaccines help?
3.Why is a balanced diet useful?
4.What carries oxygen from lungs to cells?
5.Which system sends messages through nerves?
6.What do kidneys remove from blood?
7.Which cells carry oxygen?
8.Why does heart rate rise during exercise?
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 6
- How do lungs and circulation interact?Lungs add oxygen to blood, which carries it to cells
- How do vaccines help?They prepare immunity to recognize a pathogen
- Why is a balanced diet useful?It supplies varied nutrients
- What carries oxygen from lungs to cells?The circulatory system
- Which system sends messages through nerves?The nervous system
- What do kidneys remove from blood?Wastes and extra water
- Which cells carry oxygen?Red blood cells
- Why does heart rate rise during exercise?Muscles need oxygen and nutrients faster
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.