| A | B |
|---|
| respiration | enery-releasing process that is fuled by oxygen |
| nose | organ through which air enters the respiratory system |
| epiglottis | small flap of tissue that closes over the trachea (windpipe) |
| trachea | windpipe; carries air from the nose to the lungs |
| vocal cord | fold of tissue stretched across the larynx that vibrates with the movement of air to form sound |
| larynx | voice box; organ that contains the vocal cords |
| bronchus | tube that branches off from the trachea and enters the lung |
| lung | main respiratory organ |
| alveolus | grapelike clusters of round sacs in the lungs; site of gas exchange |
| diaphragm | dome-shaped muscle that aids in breathing |
