| A | B |
| air | 空气 gas you breathe in or out |
| mucus | 粘液 sticky liquid inside trachea and lungs. |
| exhalation | breathe out air 呼气 |
| nasal cavity | place inside your nose 鼻腔 |
| bronchi | 支气管 2 tubes from the windpipe for air to pass |
| larynx | 喉 voice box, top of the windpipe |
| pharynx | 咽腔 throat, connect the mouth with esophagus |
| epiglottis | 会厌软骨 It covers the windpipe when you swallow. |
| trachea | 气管 windpipe, a tube for air to pass in and out of lungs |
| cilia | 纤毛 tiny hairs on windpipe |
| oral cavity | place inside the mouth 口腔 |
| bronchioles | 微支气管 small branches of bronchus |
| alveoli | tiny balloons in the lungs 肺泡 |
| capillaries | tiny blood vessel 毛细血管 |
| diffusion | 扩散 how things enter or leave a cell through cell membrance |
| cellular respiration | 细胞呼吸 how cells take in oxygen + glucose to make energy, CO2+H2O |
| intercostal muscles | muscels between ribs 肋间肌 |
| diaphragm | 隔膜 It separates chest from belly and helps breathing. |
| pleura | 胸膜 membrane that covers lungs |
| inhalation | take (breathe) in air 吸气 |
| total lung capacity | 总肺活量=vital capacity+residual volume; largest volume the lung can be expanded |
| vital capacity | 肺活量 largest amount of air you can breathe out after a deep breath. |
| residual volume | 残余气量 The volume of air remaining in the lungs after a maximal expiratory effort |