The Respiratory System

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Across
  1. 2. holds the organs above it so they don't fall down when the lungs exhale
  2. 4. This is where the respiratory system starts
  3. 5. they bring oxygen into our bodies and send carbon dioxide out
  4. 7. They expand during inhalation taking in oxygen, and shrink during exhalation expelling carbon dioxide
  5. 8. allows the passage of inspired and expired air into and out of the lung
Down
  1. 1. It protects your trachea so food doesn't go into our lungs
  2. 3. receiving air from the nasal cavity and air, food, and water from the oral cavity
  3. 4. air filled space above and behind the nose in the middle of the face
  4. 6. to deliver air to a diffuse network of around 300 million alveoli in the lungs