How Muscles Move Bones
Understand that muscles work in pairs to move bones: when one muscle contracts (gets shorter and pulls), the opposite muscle relaxes, and that some muscles are voluntary (we choose to use them) while others like the heart are involuntary (they work automatically)
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How Muscles Move Bones means muscles working in pairs to move bones, with voluntary and involuntary examples. We will practise once together, then check a fresh example.
Spend about 12 minutes modelling a muscle pair and sorting voluntary/involuntary, then checking one fresh idea.
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Start practiceHow Muscles Move Bones practice
Choose muscle pair and voluntary facts.
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Learning resources
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KidsHealth · Practice link — not the full lesson
Heart and Circulatory System
Before you open · source notes
Heart and Circulatory System supports How Muscles Move Bones. An adult previews and guides; this is a learning page, not a scored quiz.
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Before you openAsk the learner one fact they learned and one question they still have.
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Public KidsHealth page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
KidsHealth. “Heart and Circulatory System.” External page; Gakuva does not copy, host, embed, or redistribute materials.
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Check understanding
- Demonstrate or describe how biceps and triceps work as a pair to bend and straighten the arm
- Explain the difference between voluntary muscles (we control them) and involuntary muscles (they work automatically)
- Name the heart and muscles of the digestive system as examples of involuntary muscles
“Can your child bend their arm and explain that one muscle is pulling while the other is relaxing — and that their heart muscle works without them thinking about it?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- The Human Body
- Age range
- Ages 7–9