Respiratory System

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Across
  1. 1. The tiny membrane which prevent the entry of food and water into the lung.
  2. 3. It a ring-like cartilage which passes air into the lungs.
  3. 5. It is a membrane which separates the chest and abdomen.
Down
  1. 2. It is an act which helps to remove the dust entered into the nose.
  2. 4. These are present at the end of bronchioles.