It's not that all these layers are wrapped around the nervous system and the endocrine system.

不是所有功能,都围绕着神经系统和内分泌系统展开的

耶鲁公开课 - 生物医学工程探索课程节选

It also turns out that they're made stable in these environments like milk and mucus secretions because of this secretory chain which is wrapped around it.

同时,连接抗体还可以,使抗体在像乳汁或是粘液分泌物,这样的体内环境中保持稳定,因为分泌循环系统可以将抗体包裹在内

耶鲁公开课 - 生物医学工程探索课程节选