英语单词“yolk sac, yolk bag”的翻译、意思、用法、释义-英汉词典

单词	yolk sac, yolk bag
释义	yolk sac, yolk bag1.■【胚胎学】2.■卵黄囊(从脊椎动物胚胎的中肠脐伸出的膨大的胚外囊体，富含卵黄)3.■卵黄囊(大多数哺乳动物胚胎中不含卵黄的、在胚胎发育早期变为退化器官的同源器官)
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