“primitive cardiovascular system”的概念、定义、翻译、参考文献-科学参考

单词	primitive cardiovascular system
释义	primitive cardiovascular system Encyclopedia 医学心血管系统的发生释 primitive cardiovascular system原始心血管系统人胚第3～5周，胚体内逐渐形成心管、动脉和静脉，构成卵黄循环、脐循环和胚体循环组成的系统。
随便看	director plane direct or reversecirculation rotary drill directors and officers liability insurance Director's Assistant director's editing version Directors Guild of America director's interpretation Director's Obligation director's perspective director sphere director's rehearsal director's rough cut director surface director team director-unit system director workbench directory directory archival retrieval tools directory-based cache coherence protocol directory database Directory of Open Access Journals Directory of Publishing directory search engine directory sorting direct output laser module

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