The Respiratory System

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Across
  1. 4. A large air tube that begins at the end of the trachea and branches into the lungs.
  2. 5. A channel for airflow through the nose.
  3. 6. A hollow tube that is about 5 inches long and starts behind the nose and ends at the top of the trachea, wind pipe, and esophagus.
  4. 7. A tube like portion of the respiratory tract that connects the larynx with the bronchial parts of the lungs. Also know as the wind pipe.
Down
  1. 1. Large, delicate tubes that carry air into the tiny branches and smaller cells of the lungs after the air has passes through the mouth, nasal passages, and wind pipe.
  2. 2. The muscles that separates the chest cavity from the abdomen.
  3. 3. Either one of the two organs that people and animals use to breathe air.