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The Diaphragm Beneath the Lungs

Your diaphragm is a dome-shaped muscle under your lungs. When it flattens and moves down, your chest gets bigger and air flows into your lungs.

In the picture

  1. The diaphragm: a dome-shaped muscle under the lungs that moves downward.
  2. The lungs: two pink air-filled organs in the chest.
  3. The rib cage: curved bones around the lungs.
  4. The nostrils: two openings where outside air enters the nose.

Examples

  • Taking a deep breath before blowing out candles.
  • The chest rising and falling while sleeping.

Quiz: The Diaphragm Beneath the Lungs (Age 8)

  1. What kind of body part is the diaphragm?

    • A bone
    • A muscle
    • A blood vessel
  2. What happens when the diaphragm moves down?

    • Air flows into the lungs
    • Air flows out of the lungs
    • The chest gets smaller
  3. What shape is the diaphragm?

    • Dome-shaped
    • Round like a ball
    • Straight like a tube

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.

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Science, Age 8