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yolk-sac的英文翻譯是什麼意思，詞典釋義與在線翻譯：
英英釋義
名詞 yolk sac:
-
membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
-
membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
yolk-sac的用法和樣例：
例句
- The yolk sac is gradually vascularized.
卵黃囊逐漸被血管化了。 - The dye Trypan Blue has a remarkable biphasic effect on pinocytosis by yolk sal.
染料錐蟲藍對卵黃囊的胞飲作用具有明顯的雙向作用。
