胎盘的

例句：

1. 1. The placenta is the organ that connects the mother and fetus during pregnancy.
   胎盘是连接母亲和胎儿在怀孕期间的器官。
2. 2. During labor, the placenta transfers nutrients from the mother to the fetus.
   在分娩过程中，胎盘将营养物质从母亲传递给胎儿。
3. 3. The placenta plays a crucial role in the development of the fetus.
   胎盘在胎儿发育中起着至关重要的作用。