①胚胎围心腔：供胎心发育的体腔部分；②血腔：无脊椎动物如大部分软体动物、节肢动物和被囊动物的细胞和组织间隙的总称。有血性液体(血淋巴液)循环于中- extinction
- extinguish
- extirpation
- extorsion
- extra-
- extra-adrenal
- extra-anthropic
- extra-articular
- extrabronchial
- extrabuccal
- extrabulbar
- extracapsular
- extracardial
- extracarpal
- extracellular
- extracerebral
- extracorporal
- extracorporeal
- extracorpuscular
- extracorticospinal
- extracranial
- extract
- extraction
- extractive
- extractor