Papillae filiformes

例句：

1. 1. The uterus is lined with papillae that help to protect the fetus during pregnancy.
   子宫被乳头状物覆盖，这些结构在怀孕期间帮助保护胎儿。
2. 2.The skin of the palm has papillae that are sensitive to touch.
   手掌的皮肤上有乳头状物，它们对触摸非常敏感。
3. 3. The shape of the papillae on the surface of the skin can vary depending on the individual's genetic makeup.
   皮肤表面乳头状物的形态因人而异，这取决于个人的遗传特征。