Revision ~ HEART

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Across
  1. 2. Disease related to the respiratory system
  2. 3. Air pressure in the lungs increases
  3. 7. It has higher concentration of oxygen
  4. 9. Alveolus --> X --> bronchus --> trachea
  5. 10. Moves down and flatten during inhalation
Down
  1. 1. A tube which then branching out into two smaller tubes called bronchi
  2. 4. Surrounded by many blood capillaries
  3. 5. Gas diffuses into the blood capillary
  4. 6. The process of gaseous exchange takes place between the alveolus and the blood capillary
  5. 8. The movement is controlled by the intercostal muscles