| A | B |
| The organs that interchange gases are_________. | lungs |
| How often to hiccups occur? | occasionally |
| At around 23,000 feet humans start feeling dizzy because of the lack of __________. | oxygen |
| The purpose of the repiratory system is to move air _____ and ______ of the lungs. | in and out |
| How many organs are there in the respiratory system? | seven |
| What does the air consist of ? | gases |
| How does the repiratory system clear blockage? | coughing and sneezing |
| Do people with asthma have a thinner or thicker bronchiole? | thinner |
| The articulaton of the voice is controlled by the _________ __________. | respiratory system |
| Where is the breathing control center located? | brain stem |