Then, they start producing an extracellular matrix that holds them together as they divide and reproduce.

其后，细胞开始制造细胞外基质，细胞分裂、繁殖时细胞外基质能够保持细胞的完整。

Collagen accompanies the extracellular matrix in providing the structure and tensile strength of connective tissues like our ligaments and tendons.

胶原伴随细胞外基质，为韧带和肌腱等结缔组织提供结构和抗拉强度。

Finally — and as strange as it may sound — all connective tissues are mostly composed of nonliving material, called the extracellular matrix.

最后——听起来可能有点奇怪——所有结缔组织大多是由被称为细胞外基质的无生命物质组成的。

These growth factors cause the mesangial cells to regress back to their more immature stem cell state known as mesangioblasts and secrete extracellular structural matrix.

这些生长因子使得系膜细胞退化成为未成熟的干细胞状态（成系膜细胞），并分泌细胞外基质框架。