Respiratory System Crossword

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Across
  1. 4. A large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.
  2. 5. The membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.
  3. 6. The part projecting above the mouth on the face of a person or animal, containing the nostrils and used for breathing and smelling.
  4. 7. The hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals; the voice box.
  5. 8. Tiny sacs of lung tissue specialized for the movement of gases between air and blood.
Down
  1. 1. A dome-shaped muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs.
  2. 2. The two passages that direct air into the lungs.
  3. 3. Either of the two large organs of respiration located in the chest cavity and responsible for adding oxygen to and removing carbon dioxide from the blood.