The yolk sac and yolk stalk on one of them were well preserved. 观察了三例人胚外形,其中一例还有保存良好的卵黄囊(YS)和卵黄蒂。
The experiment was conducted to study the nutrition absorption and utilization in yolk sac of fasting gosling. 以扬州鹅初生雏鹅为试验对象,研究在绝食条件下雏鹅对卵黄囊(YS)营养吸收与利用的规律。
Application of digital imaging technique in quantitative analysis of blood vessels in chick embryo yolk sac membranes 数字图像分析技术在鸡胚卵黄囊(YS)膜血管形成模型中的应用
A human yolk sac is used briefly and then vanishes. 人类的卵黄囊(YS)用得时间很短,很快就会消失。
Development and Consumption of Yolk Sac(YS) of Newly-hatched Larval Japanese eel Anguilla japonica 池塘养殖鳗鲡初孵仔鳗生长发育和卵黄消耗的研究