Respiratory System Vocabulary

1.    diaphragm - the muscle in your body that helps you inhale and exhale

2.    lungs - a pair of spongy, bag-like organs of the body that expand when filled with air

3.    trachea/windpipe - a tube made of cartilage that carries air from the throat to the lungs

4.    air sacs - tiny thin-walled pouches in the lungs where oxygen enters the blood and carbon dioxide leaves the blood

5.    cartilage - a tough, flexible body material

6.    inhale - to breathe in

7.    exhale - to breathe out

8.    bronchial tubes - two tubes that branch out from the trachea

9.    bronchioles - tubes that branch out from the bronchial tubes

10.    breathing - the process in which the body takes in fresh air, containing oxygen, and forces out used air, containing carbon dioxide

11.    breathing rate - the number of times a person inhales in one minute