英语词汇“allantoic sac”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	allantoic sac
释义	DictionarySeesac allantoic sac al·lan·to·ic sac the dilated distal portion of the allantois; it forms part of the placenta in many mammals. allantoic sac The expanded end of the allantois, well developed in birds and reptiles.See also: sac
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allantoic sac