| A | B |
|---|
| Asthma | restricts breathing; tightening the bronchial tubes |
| Allergies | are caused by allergens in the air and or another air pollutant |
| Pneumonia | an infection of the lungs |
| Cilia | hair like structures in the nasal passages, trachea and bronchi |
| bronchi | two tubes that branch out from the trachea |
| lungs | two sac-like organs that replace the carbon dioxide in your blood with oxygen |
| lung capacity | the amount of air that can be taken into the lungs with one breath |
| alveoli | tiny air sacs within the lungs which help with the exchange of oxygen and carbon dioxide |
| C shaped rings of cartilage | all the trachea and brochi from collapsing and allow them to move |
| capillaries | tiny blood vessels that surround the alveoli |
| trachea | also known as the windpipe |
| Larynx | also known as the voice box |
| pharynx | also known as the throat |
| epiglottis | the flap of tissue that covers the trachea when a person swallows |
| vocal cords | the pitch of sound is determined by the thickness and length of these |
| oxygen | every cell needs this to live and function |
| inhaling | breathing in |
| exhaling | breathing out |
| Hiccups | caused by involuntary movements of the diaphragm |
| nasal cavity | the large air space located behing your nostrils |
