| A | B |
|---|
| Diaphragm | muscle under the lungs that controls breathing |
| lungs | organs used for breathing |
| trachea | tube that leads to the lungs, made up of cartilage rings |
| epiglottis | tissue that covers the trachea to prevent food from entering |
| alveoli | air sacs of the lungs |
| ribs | protect the lungs |
| inhaling | breathing in |
| exhaling | breathing out |
| carbon dioxide | the waste product of the blood that leaves the lungs |
| oxygen | enters the blood system through the lungs |
| blood | carries oxygen to the body cells |
| Bronchi | tubes that enter the lungs from the trachea |
| bronchiole tubes | smaller tubes that lead from the bronchi to the alveoli |
| capillary | small blood vessels that surround the alveoli |
| alveoli | site of gas exchange |
| emphysema | caused by smoking and destroys the air sacs in the lungs |
| pneumonia | illness that fills the alveoli with mucus and alveoli |
| Pleura | outer membrane which covers the lungs |
| Larynx | voice box |
| Larynx | muscular organ between the pharynx and trachea |
| lungs | spongelike organs where gas exchange takes place |
| mitochondria | cell structure that is used for respiration |
| nasal cavity | cleans, warms and moistens the air |
| pharynx | cavity behind the mouth |
| trachea | also known as the windpipe |
| cellular respiration | process by which energy is produced in cells |
| medulla | part of the brain that controls breathing |
| lung cancer | umors often caused by smoking |
| ATP | energy produced which is the ultimate role of respiration |
| anaerobic | respiration that occurs in yeast; without oxygen |
| glucose | the sugar that gets broken down to release its energy |
