| 面积 | miàn jī | area (of a floor, piece of land etc) / surface area / tract of land |  |
| 呼吸道 | hū xī dào | respiratory tract |  |
| 气道 | qì dào | flue / air duct / air passage / respiratory tract | |
| 气管 | qì guǎn | windpipe / trachea / respiratory tract / air duct / gas pipe | |
| 消化道 | xiāo huà dào | digestive tract | |
| 尿道 | niào dào | urethra / urinary tract | |
| 胃肠道 | wèi cháng dào | gastrointestinal tract | |
| 消化系统 | xiāo huà xì tǒng | digestive system / gastrointestinal tract | |
| 胆道 | dǎn dào | bile duct / biliary tract | |
| 片 |  piàn | thin piece / flake / a slice / film / TV play / to slice / to carve thin / partial / incomplete / one-sided / classifier for slices, tablets, tract of land, area of water / classifier for CDs, movies, DVDs etc / used with numeral 一[yi1]: classifier for scenario, scene, feeling, atmosphere, sound etc / Kangxi radical 91 | |
| 尿生殖管道 | niào shēng zhí guǎn dào | urinogenital tract | |
| 春秋繁露 | chūn qiū fán lù | Luxuriant Dew of the Spring and Autumn Annals, ideological tract by Han dynasty political philosopher Dong Zhongshu 董仲舒[Dong3 Zhong4 shu1] | |
| 正确处理人民内部矛盾 | zhèng què chǔ lǐ rén mín nèi bù máo dùn | On the correct handling of internal contradictions among the people, Mao Zedong's tract of 1957 | |
| 泌尿器 | mì niào qì | urinary tract / urinary organs | |
| 肠胃道 | cháng wèi dào | digestive tract | |
| 马氏管 | Mǎ shì guǎn | Malpighian tubule system (in the insect digestive tract etc) | |
| 生殖道感染 | | reproductive tract infection | |
| 上呼吸道感染 | shàng hū xī dào gǎn rǎn | upper respiratory tract infection | |
| 虾线 | xiā xiàn | digestive tract of a shrimp / sand vein | |
