Grade 3 · Science · Building Confidence
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 · Building confidence · 8 questions · Version PG-1PCFJ43-L51E
1.Which cells carry oxygen?
2.What is the immune system's job?
3.Why do people need sleep?
4.Which system sends messages through nerves?
5.How do vaccines help?
6.Why is a balanced diet useful?
7.Where does digestion begin?
8.What do muscles do?
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
- Which cells carry oxygen?Red blood cells
- What is the immune system's job?Defend against harmful pathogens
- Why do people need sleep?To help the body and brain recover
- Which system sends messages through nerves?The nervous system
- How do vaccines help?They prepare immunity to recognize a pathogen
- Why is a balanced diet useful?It supplies varied nutrients
- Where does digestion begin?In the mouth
- What do muscles do?They contract to move body parts
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.