There's a couple of features of cellular physiology

这里展示了
which are shown here.

一些细胞生理学的要点
One is that cells form tissues that are mechanically intact,

一是具有机械完整性的组织是由细胞构成
they have mechanical integrity

组织之所以具有机械完整性
because they can adhere to one another.

是因为细胞能够互相黏附在一起
The other is that this kind of adherence

另外这种黏附
gives the tissue a property that's useful,

给予组织一种非常有用的属性
in this case the property is it can serve

这种属性表现为组织成为
as a barrier to nutrients from entering our body.

营养物质进入身体过程中的屏障
The other reason why cells stay together is that

另一个使细胞凝聚在一起的原因是
they're surrounded by a

它们被
matrix that's called extracellular matrix.

叫做细胞外基质的一种基质所包围