Y8 Humans 01 breathing

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Lesson on breathing and the respiratory system

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Y8 Humans 01 breathing

  1. 1. Breathing <ul><li>Learning Objectives : </li></ul><ul><li>To understand the role of the respiratory system in humans. </li></ul><ul><li>To know how breathing links to cellular respiration. </li></ul><ul><li>To visualise how the lungs work using a model. </li></ul>
  2. 2. Feel yourself breathing <ul><li>Sit still and close your eyes </li></ul><ul><li>Concentrate on what happens as you breathe in and out. </li></ul><ul><li>Focus on how your chest expands and relaxes. </li></ul><ul><li>Think about what parts of your body are moving. </li></ul>
  3. 3. The Respiratory System Ribs – to protect the chest Bronchioles Bronchi Trachea – has stiff rings of cartilage to prevent it collapsing Rib muscles – to raise and lower the ribs Lung Diaphragm – muscular sheet Alveoli (“air sacs”) – gas exchange takes place here
  4. 6. Why are these so different? Explain why we need to take in oxygen and get rid of carbon dioxide.
  5. 7. Breathing <ul><li>Learning Objectives : </li></ul><ul><li>To understand the role of the respiratory system in humans. </li></ul><ul><li>To know how breathing links to cellular respiration. </li></ul><ul><li>To visualise how the lungs work using a model. </li></ul>

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