The pressure of the blood entering capillary beds forces some fluids out of the capillaries and into the tissue spaces.

进入毛细血管床的血液压力迫使一些液体从毛细血管中流出，进入组织间隙。

Also, if the fluids remained in the tissue spaces, it would accumulate and lead to edema, which is an excessive accumulation of fluid in tissue spaces.

此外，如果液体留在组织间隙，它会积聚并导致水肿，这是组织间隙中液体的过度积聚。