肠周腔：胚胎原始内脏周围腔- extracranial
- extract
- extraction
- extractive
- extractor
- extractum
- extracystic
- extradural
- extraembryonic
- extraepiphyseal
- extragenital
- extrahepatic
- extraligamentous
- extramalleolus
- extramastoiditis
- extramedullary
- extrameningeal
- extramitates
- extramural
- extraneous
- extranuclear
- extraocular
- extraosseous
- extraparenchymal
- extrapelvic