| A | B |
|---|
| nasal cavity | air is moistened warmed and filtered |
| pharynx | passageway for food and air |
| trachea | passageway for air (windpipe) does have mucus and silia. cleans air with mucus hairs |
| bronchi | carries air into lungs |
| bronchioles | smallest air tube inside lungs |
| alveoli | tiny air sacs in lungs that exchangeoxygen and CO2 with capillaries |
| epiglottis | flap of tissue that keeps food from going down trachea |
| diaphragm | sheet of muscle that makes air come in and go out of lungs |
| hemoglobin | chemical in RBC that gives oxygen to tissues and gives blood its color. |
| inhalation (What happens during this?) | when you breathe in your diaphragm moves downward and your chest area expands |
| exhalation (What happens during this?) | when you let CO2 out of your body your diaphragm moves upward and your chest area relaxes |
