Grade 3 · Science · Challenge
Free Human Body & Health worksheet - version 10
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-1X0G96E-WAAR
1.What carries oxygen from lungs to cells?
2.What maintains stable internal conditions?
3.How do lungs and circulation interact?
4.How do vaccines help?
5.Which system sends messages through nerves?
6.Why is a balanced diet useful?
7.Which cells carry oxygen?
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 10
- What carries oxygen from lungs to cells?The circulatory system
- What maintains stable internal conditions?Homeostasis
- 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
- Which system sends messages through nerves?The nervous system
- Why is a balanced diet useful?It supplies varied nutrients
- Which cells carry oxygen?Red blood cells
- 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.