Some lymphoid organs are in the form of diffuse lymphoid tissue, where they are just a loose arrangement of lymphoid cells and protein, this is typical in the lining of the gastrointestinal and respiratory tract.

一些淋巴器官以弥散淋巴组织的形式存在，它们只是由淋巴细胞和蛋白质松散排列而成，这在胃肠道和呼吸道的内层很典型。