Respiratory System

3. holds the vocal cords and vocal box
6. a dome-shape muscular partition which separates the chest from the abdomen
8. the action of breathing
11. any of the major air passages of the lungs which diverge from the windpipe
12. a pair of breathing organs located in the chest which remove carbon dioxide and bring oxygen to the blood

1. large air tubes or passages which are formed by the division of the trachea
2. space inside the nose which allows air to move through
4. the tube which carries air from the nose and mouth into the chest cavity
5. a flap of cartilage in the oesophagus which stops food from entering the windpipe
7. a cluster of sacs at the end of the bronchioles where gas exchange occurs
9. small tubes or branches which form from the division of the trachea
10. a hollow tube at the back of the nose which connects the mouth and nose to the oesophagus