“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	free radical lifetime free radical metabolism free radical polymerization free random walk free range free range raising free-reed flute free resolution free ribosome free rider problem free ring free rootstock free rotation free school free Schroder path free scientific research theory in law free semester system free semigroup free set free settling free settling lamination theory free settling terminal velocity free sheaf free software Free Soil Party

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