(接上期)一、运输和进行物质交换微循环的基本功能是向组织细胞运送氧气和养料,带走代谢的产物。微循环中的毛细血管只有一层内皮细胞,管壁非常薄,可以允许小分子物质自由进出,再加上毛细血管交织成网,有足够的场地和面积进行物质交换。这样在血液中浓度较高的氧气和营养细胞代 (Continued) First, the transport and the exchange of material The basic function of microcirculation is to transport oxygen and nutrients to the tissue cells, away the metabolic products. Microcirculation in the capillary only a layer of endothelial cells, the wall is very thin, allowing free access to small molecules, coupled with capillary network intertwined, there is sufficient space and area for material exchange. This high concentration of oxygen in the blood and vegetative cells on behalf of