Grade 3 · Science · Challenge
Free Human Body & Health worksheet - version 8
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-OG1KRX-WAAR
1.Why is a balanced diet useful?
2.Which cells carry oxygen?
3.What do kidneys remove from blood?
4.How do vaccines help?
5.What maintains stable internal conditions?
6.How do lungs and circulation interact?
7.What is the immune system's job?
8.Which system sends messages through nerves?
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 8
- 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
- How do vaccines help?They prepare immunity to recognize a pathogen
- What maintains stable internal conditions?Homeostasis
- How do lungs and circulation interact?Lungs add oxygen to blood, which carries it to cells
- What is the immune system's job?Defend against harmful pathogens
- Which system sends messages through nerves?The nervous system
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.