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allantoic sac
释义
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sac
allantoic sac
al·lan·to·ic sac
the dilated distal portion of the allantois; it forms part of the placenta in many mammals.
allantoic sac
The expanded end of the allantois, well developed in birds and reptiles.
See also: sac
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更新时间：2025/2/14 21:06:44