Respiratory System

12345
Across
  1. 3. organ collects air from the environment
  2. 5. organ aids in the breathing process and allows the rib cage to expand
Down
  1. 1. organs exchange gases between air and the blood
  2. 2. tubes that move air from the trachea to the lungs
  3. 4. organ is known as the “windpipe” and moves air from the nose to the lungs