Peyer's patch

例句：

1. 1. The Peyer's patch is where the immune system first encounters pathogens.
   Peyer's patch是免疫系统首次遇到病原体的地方。
2. 2.During digestion, food particles are broken down in the small intestine and then absorbed into the bloodstream.
   在消化过程中，食物颗粒在小肠被分解并吸收到血液中。
3. 3. The Peyer's patch is also important for producing antibodies that fight off infections.
   Peyer's patch还负责产生抗体，以抵抗感染。