| 单词 | vitelline circulation |
| 例句 | Thus, the secondary, allantoic circulation gradually takes the place of the original vitelline circulation. The Evolution of Man — Volume 1 These vessels naturally atrophy with the degeneration of the umbilical vesicle, and the vitelline circulation is replaced by a second, that of the allantois. The Evolution of Man — Volume 1 |
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