Science // The Human Body

Bones & Muscles

Know that the body has a skeleton made of bones inside it that gives the body its shape and protects important organs like the brain (skull) and heart (ribcage), and that muscles attached to bones allow the body to move

Ages
5 to 7
Type
Concept
Builds on
0 topics
Leads to
3 topics

Quick check

Can the learner feel their own ribs or skull and explain what those bones are protecting inside?

Ask this to see whether the topic is secure.

Topic // Mastery

What mastery looks like

What a learner can do once this topic is secure.
  • State that bones give the body shape, support, and protection
  • Name at least three bones or bone groups (e.g. skull, ribcage, spine, leg bones)
  • Explain that muscles pull on bones to make the body move

Topic // Map

Where this fits

What to learn first and what this topic opens up, with the reason for each link. Required links come first.
  • RequiredMust come first
  • HelpfulHelps, but not essential

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0 topics

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Bones & Muscles

Ages 5 to 7 // Concept

Leads to

3 topics
  • How Muscles Move BonesRequired

    The Human Body // Ages 7 to 9

    Understanding muscle pairs builds on knowing muscles attached to bones allow movement

  • Naming Major BonesRequired

    The Human Body // Ages 7 to 9

    Naming specific bones builds on knowing the body has a skeleton that supports and protects

  • Skeletons & MusclesHelpful

    Organisms & Life Processes // Ages 7 to 8

    Enrichment knowledge of skeleton and muscles supports formal curriculum study of skeletons for support, protection, movement

Topic // Research-informed

Teaching notes

From the Marble Skill Taxonomy. These notes have not been validated in classrooms, so treat them as a starting point for your own judgement.

The approach

For ages 5–7, introduce the skeleton as the hard, living framework inside the body that does three jobs: giving the body shape and holding it up (support), protecting soft important organs (skull as a helmet for the brain, ribcage as a cage for the heart and lungs), and — working with muscles — letting the body move. The often-missed key idea for this age is that muscles PULL on bones to move them; they do not push. Teach it on the child's own body: feel the hard skull, ribs and spine, and feel an upper-arm muscle bunch up when it lifts. Name only a few bones/groups (skull, ribcage, spine, leg bones). Confront the common ideas that bones are dead sticks or that we are squishy with no frame.

Common misconceptions

  • 'Bones are dead / just hard sticks' — they are living parts that grow and even make blood.
  • 'Muscles push bones to move them' — muscles PULL (shorten) to move bones; they can't push.
  • 'The skeleton is only in the arms and legs' — missing the skull, spine and ribcage.
  • 'Without a skeleton we'd still stand up' — missing that the frame gives shape and support (we'd be floppy).
  • 'The skull is solid all the way through' — it's a protective case around the brain.
  • 'Bones and muscles are the same thing' — bones are the hard frame; muscles are the soft parts that pull them.

Useful representations

  • A simple labelled skeleton showing shape/support (the frame that holds us up)
  • Protection images: skull-as-helmet over the brain, ribcage-as-cage around heart/lungs
  • The child's own body — feeling hard bones (skull, ribs, spine) and a working muscle
  • Muscle-pulls-bone shown as a muscle shortening to move a limb
  • A 'no skeleton' contrast (a floppy body) to show why we need a frame

Teaching practices

  • Use the child's own body as the manipulative: feel the hard skull, ribs and spine, and feel an arm muscle bunch when it lifts — so structure and function are felt, not just seen.
  • Teach the three jobs with vivid protection images (skull = helmet for the brain, ribcage = cage around the heart and lungs) — the most memorable hook at this age.
  • Establish early that MUSCLES PULL bones to move them (they can't push), setting up the antagonistic-pair idea later without over-complicating now.
  • Name only a few bones/groups (skull, ribcage, spine, leg bones) and locate them on the body, keeping the load age-appropriate.
  • Confront 'bones are dead/just sticks' and 'we're squishy with no frame' — the skeleton is a living frame that supports and shapes us.

Activities to try

  1. 1

    Tap-to-explore skeleton: name the bones and reveal their jobs

    Why it works: The hard frame inside you gives your body shape and guards the soft, important parts inside; bones are living, not dead sticks.

    1. Look at a simple labelled child-figure skeleton and tap the skull, ribcage, spine and leg bones one at a time; each part highlights and names itself.
    2. Open a 'what does this protect?' flap on the skull to find it is a helmet around the brain, and on the ribcage to see it caging the heart and lungs.
    3. Open a lift-the-flap on a bone to discover bones are alive, grow, and even make new blood cells inside them, busting 'bones are dead sticks'.
    4. For each part, say out loud its job: 'the skull protects my brain', 'the leg bones hold me up'.
  2. 2

    Feel your own frame

    Why it works: The bones you can feel on your own body are the same frame shown in the picture, and they shield the soft parts inside.

    1. Press the top and back of your head to feel the hard skull; run your fingers down the middle of your back to feel the spine; press the front of your chest to feel the ribs.
    2. Match each hard part you feel to the same part on the picture.
    3. Say which soft organ each hard part is guarding (skull→brain, ribs→heart and lungs).
  3. 3

    Make it move / take the skeleton away

    Why it works: Muscles pull (shorten) on bones to move them — they don't push — and without the skeleton the body would flop with no shape or support.

    1. On a simple toy-like rig, tap a muscle on the figure's arm and watch it shorten and pull the limb so the arm bends.
    2. Squeeze your own upper arm while you bend your elbow and feel the muscle get hard and pull.
    3. Flip a 'remove skeleton' toggle and watch the figure flop, then say why a frame is needed to stand up.
    4. Say in your own words: 'muscles pull on bones to move them.'

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