| A | B |
|---|
| respiratory system | the group of organs that take oxygen in from the air |
| bronchial tubes | pair of tubes between the trachea and the lungs |
| larynx | upper end of the trachea where the vocal cords are |
| mucus | sticky liquid produced by tissues of the nose |
| inhale | breathe in |
| trachea | tube between throat and bronchial tubes |
| exhale | breathe out |
| diaphragm | large muscle below ribs that helps you bgreathe |
| plasma | watery part of blood |
| capillary | tiny blood vessel through which oxygen and nutrients pass to surrounding cells |
| excretory system | organs that get rid of cell wastes |
| pores | tiny openings in the surface of your skin |
| kidney | one of two organs in the lower back that filters wastes from the blood |
| urine | cell wastes combined in the kidneys |
| urinary bladder | saclike organ that stores urine until it is excreted |
| allergy | sensitivity to a substance, sometimes resuilting in partial closing of bronchial tubes |
| cancer | disease in which abnormal cells keep organs and tissues from working properly |
| emphysema | disease which damages the walls of the air sacs |
