中文翻译与英英解释 | 【生物学】卵黄囊。
| | | yolk: n. 1.蛋黄，卵黄。 2.羊毛油脂。 3.【生物学】( ... | | sac: n. 1.【生物学】囊，液囊。 2.上衣 (＝sack) ... | |
| membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
| | membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
同义词：vitelline sac, umbilical vesicle, vesicula umbilicus,
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| The yolk sac is a membranous [attached to an embryo], providing early nourishment in the form of [[yolk in bony fishes, sharks, reptiles, birds, and primitive mammals. It functions as the developmental circulatory system of the human embryo, before internal circulation begins. |
例句与用法 | 1. | The gonads form from a group of large granulated yolk sac cells which invacle the germinal ridges .
性腺是由一群大的颗粒的卵黄囊细胞入缀生殖峭而形成。
| | 2. | Effects of potassium dichromate on lipid fluidity of cell membrane of yolk sac in rats
重铬酸钾对卵黄囊细胞膜脂质流动性的影响
| | 3. | An endodermal sinus tumor ( yolk sac tumor ) of the testis is shown composed of primitive germ cells that form glomeruloid or embryonal - like structures
睾丸的内胚层窦肿瘤（卵黄囊肿瘤）由原始生殖细胞构成，这些细胞形成血管球或胚芽样结构。
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