是存在于免疫组织（胸腺，淋巴结，脾脏，骨髓）中的上皮细胞，表达多种生长因子，配体和受体，并促进淋巴细胞的发育，成熟，凋亡和免疫反应。 Stromal cells are epithelial cells present in immune tissues (thymus, lymph node, spleen, bone marrow) that express numerous growth factors, ligands, and receptors, and which facilitate lymphocyte development, maturation, apoptosis, and immune responses. https://link.springer.com/referenceworkentry/10.1007/978-3-642-54596-2_201399

粘附的多层细胞复合物的基质，为造血作用提供了微环境。由内皮，成纤维细胞，网状细胞，脂肪细胞和巨噬细胞组成。提供住宿并发布短期生长因子。 Matrix of adherent multilayered cellular complex that provides the microenvironment for hematopoiesis. Composed of endothelium, fibroblasts, reticular cells, fat cells, and macrophages. Furnishes lodging and issues short-range growth factors.