fundus change in toxeimia of pregnancy

例句：

1. 1. The fundus of the heart is visible through a scan.
   通过扫描可以看到心脏的胎儿部分。
2. 2. The fundus of the stomach is where the lining begins to form.
   胃的胎儿部分是内层开始形成的地方。
3. 3. The fundus of the brain is the part that controls movement and balance.
   大脑的胎儿部分控制着运动和平衡。