The Respiratory System

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Across
  1. 4. A tube that enters the chest cavity that splits into two smaller tubes called bronchi.
  2. 6. Are the main organ in the respiratory system
  3. 7. When humans exhale they release this.
Down
  1. 1. Is located above the larynx which is where sound and speech is produced.
  2. 2. A function needed to keep humans alive by giving cells oxygen.
  3. 3. Serves as the body's pump that pumps in oxygen and pumps out carbon dioxide.
  4. 5. This is where the gas exchange of oxygen and carbon dioxide occurs.