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7th grade · Science · Unit 11 of 18

Heart, Bones & Muscles

Circulation, bones and muscles

What your child practices

The heart and blood vessels, bones, joints, muscles and tendons, how body systems work together, and heart-rate data.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 7.13(A) · the circulatory, skeletal and muscular systems

How we explain it

Children can open this short lesson before they practice.

  1. The heart pumps blood through arteries and back through veins.
  2. Bones support and protect. Joints let them move. Tendons join muscles to bones.
  3. Muscles only pull: they contract and get shorter to move a bone.

Example: How does your biceps bend your arm? Your brain sends a signal. The biceps contracts and pulls on the bone through a tendon. Answer: it contracts and pulls on the bone

Heart, Bones & Muscles in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 11 of 18 in 7th grade Science, after Human Body Systems and before Cells, Tissues & Organs.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Texas Education Agency (TEA)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Put the steps of bending your arm in order.

    • 💪The biceps contracts (gets shorter)
    • ↪️The arm bends at the elbow joint
    • 🦴A tendon pulls on a forearm bone
    • 🧠The brain sends a signal to the biceps

  2. Question 2

    What do red blood cells carry around the body?

    🔴
    • saliva
    • bile
    • stomach acid
    • oxygen

  3. Question 3

    What are capillaries?

    • the four chambers of the heart
    • the biggest arteries in the body
    • the air sacs in the lungs
    • tiny blood vessels where oxygen and nutrients pass into cells

  4. Question 4

    What is the main job of the heart?

    🫀
    • filtering the air
    • pumping blood all around the body
    • breaking down food
    • holding up the skeleton

  5. Question 5

    What happens to your heart rate when you exercise hard?

    🏃
    • it goes up
    • it stays exactly the same
    • it goes down

  6. Question 6

    Circulatory system or musculoskeletal system? Tap an item, then tap its basket.

    Sort into: 🫀 circulatory · 🦴 musculoskeletal

    • 💪biceps
    • 🔗tendons
    • 🩸veins
    • 🦴skull
    • 🩸capillaries
    • 🫀heart

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